Mechanical Properties and Fracture Characteristics in High Mn Austenitic Steel for Cryogenic Applications

泉大地, 植田圭治, 庄司博人, 大畑充, 田川哲哉

鉄と鋼　Vol. 111　No. 7　p. 368-377　2025/05　Research paper (scientific journal)

Application of Fracture Assessment Method Considering Constraint Effect to Ductile-Brittle Transition Temperature Region

Kiminobu Hojo, Takatoshi Hirota, Yasuto Nagoshi, Takuya Fukahori, Kimihisa Sakima, Mitsuru Ohata, Fumiyoshi Minami

ASME Journal of Pressure Vessel Technology　Vol. 147　p. 051501-1-051501-17　2025/04　Research paper (scientific journal)

Effect of Internal Pressure on Tensile Strength and Deformability of Linepipe Girth Weld Joint with Softened HAZ

小貫翔馬, 三津谷維基, 大畑充

溶接学会論文集　Vol. 43　No. 1　2025/03　Research paper (scientific journal)

INFLUENCE OF THE DIFFERENCE OF DUCTILE CRACK GROWTH BEHAVIOR ON THE DEFORMATION CAPACITY OF WELDED JOINTS

Toshihiro UMEDA, Masato TAKEUCHI, Hiroto SHOJI, Mitsuru OHATA

Steel Construction Engineering　Vol. 32　No. 125　p. 94-109　2025/03　Research paper (scientific journal)

Significance of fracture toughness for linear friction welded joint of weathering steel

Kazuma Shimizu, Shota Nakayama, Hiroto Shoji, Takumi Kawakubo, Tomoya Nagira, Mitsuru Ohata, Hidetoshi Fujii

Welding in the World　Vol. 69　p. 739-750　2025/02　Research paper (scientific journal)

Formulation for Evaluating Tensile Strength of Girth Weld Joint of Linepipe with Softened HAZ under Internal Pressure

S. Onuki, M. Mitsuya, Mitsuru Ohata

Welding in the World　Vol. 69　p. 781-792　2025/01　Research paper (scientific journal)

INFLUENCE OF LARGE DEFORMATION CYCLIC LOADING HISTORY ON DUCTILE CRACK GROWTH OF STEEL MEMBERS

Toshihiro Umeda, Kota Nakagiku, Hiroto Shoji, Mitsuru Ohata

Journal of Structural and Construction Engineering　Vol. 90　No. 827　p. 144-154　2025/01　Research paper (scientific journal)

2.25Cr-1Mo-V鋼溶接部の高温高圧水素供用中の水素助長割れ抵抗に及ぼす靭性の影響

安富 章忠, 大畑 充

日本機械学会論文集　Vol. 90　No. 938　2024/10　Research paper (scientific journal)

An attempt at friction-stir-welding of α-Mg/long-period stacking ordered two-phase Mg–Zn–Y–Al–La alloys: Effect of texture weakening on their mechanical properties

Shin-ichi Inoue, Michiaki Yamasaki, Mitsuru Ohata, Shigeki Kakiuchi, Yoshihito Kawamura, Hidenori Terasaki

Journal of Advanced Joining Processes　p. 100221-100221　2024/04　Research paper (scientific journal)

Modeling of Loading-path Dependent Martensitic Transformation in a Low-alloy TRIP Steel

Takashi Yasutomi, Hiroyuki Kawata, Hiroshi Kaido, Eisaku Sakurada, Shigeru Yonemura, Shunji Hiwatashi, Hiroto Shoji, Mitsuru Ohata

ISIJ International　Vol. 63　No. 12　p. 2066-2077　2023/12　Research paper (scientific journal)

Tensile Strength of Girth Weld Joint of Linepipe with Softened HAZ

Shoma Onuki, Masaki Mitsuya, Mitsuru Ohata

Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society　Vol. 41　No. 4　p. 263-272　2023/11　Research paper (scientific journal)

Crack initiation and propagation behavior of dissimilar interface with intermetallic compound layer in Al/steel joint using coupled multiscale mechanical testing

Tomoki Matsuda, Kotaro Hayashi, Chihiro Iwamoto, Takashi Nozawa, Mitsuru Ohata, Akio Hirose

Materials & Design　p. 112420-112420　2023/10　Research paper (scientific journal)

Prediction method for ductile crack initiation and growth resistance for pre-strained steel based on ductile damage model

Mitsuru OHATA, Hiroto SHOJI, Kazuma SHIMIZU, Hiroyasu TANIGAWA, Taichiro KATO, Takashi NOZAWA

Transactions of the JSME　Vol. 89　No. 926　2023/09　Research paper (scientific journal)

X-ray free electron laser observation of ultrafast lattice behaviour under femtosecond laser-driven shock compression in iron

Tomokazu Sano, Tomoki Matsuda, Akio Hirose, Mitsuru Ohata, Tomoyuki Terai, Tomoyuki Kakeshita, Yuichi Inubushi, Takahiro Sato, Kohei Miyanishi, Makina Yabashi, Tadashi Togashi, Kensuke Tono, Osami Sakata, Yoshinori Tange, Kazuto Arakawa, Yusuke Ito, Takuo Okuchi, Tomoko Sato, Toshimori Sekine, Tsutomu Mashimo, Nobuhiko Nakanii, Yusuke Seto, Masaya Shigeta, Takahisa Shobu, Yuji Sano, Tomonao Hosokai, Takeshi Matsuoka, Toshinori Yabuuchi, Kazuo A. Tanaka, Norimasa Ozaki, Ryosuke Kodama

Scientific Reports　Vol. 13　No. 1　2023/08　Research paper (scientific journal)

Mesoscopic numerical study on ductile fracture in TRIP steel under reverse loading

Takashi Yasutomi, Hiroyuki Kawata, Hiroshi Kaido, Eisaku Sakurada, Shigeru Yonemura, Hiroto Shoji, Mitsuru Ohata

Forces in Mechanics　Vol. 9　2022/12　Research paper (scientific journal)

Simulation-Based Fracture Control Design of Knock-Off Bolts for Bridges

Hiroto SHOJI, Toshihiro HAYAMIZU, Koki MORI, Kento OZAKI, Hayato NAGAKI, Toru OHMAE, Dai SAGOU, Mitsuru OHATA

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY　Vol. 40　No. 4　p. 175-185　2022/10　Research paper (scientific journal)

Prediction of stress triaxiality dependency of critical strain using mechanical properties for metallic materials

Takehisa Yamada, Mitsuru Ohata

International Journal of Pressure Vessels and Piping　Vol. 199　2022/10　Research paper (scientific journal)

Identification of ductile fracture design curve for hardened quasi-brittle AISI-D2 tool steel to predict shearing tool failure

Takashi Matsuno, Kouta Nakagiri, Tomoko Matsuda, Toshiyuki Tanaka, Takashi Yasutomi, Hiroto Shoji, Mitsuru Ohata

Journal of Materials Processing Technology　Vol. 307　p. 117680-117680　2022/09　Research paper (scientific journal)

Evaluation of Fracture Strain for Cold Drawn Thin-Walled Steel Tubes via Small Round-Bar Tensile Test

Takashi Matsuno, Tomoko Matsuda, Hiroto Shoji, Mitsuru Ohata

Metals　Vol. 12　No. 5　p. 776-776　2022/04/30　Research paper (scientific journal)

Ductile Damage Model Based on Void Growth Analysis for Application to Ductile Crack Growth Simulation

Takehisa Yamada, Mitsuru Ohata

Journal of Pressure Vessel Technology　Vol. 144　No. 1　2022/02/01　Research paper (scientific journal)

Ductile Fracture Behavior for Two-phase Steel under Tensile Deformation with Strain Path Change

Yasutomi Takashi, Matsuno Takashi, Sakurada Eisaku, Yonemura Shigeru, Shoji Hiroto, Ohata Mitsuru

Tetsu-to-Hagane　Vol. 108　No. 10　p. 772-783　2022

Modeling of Loading-path Dependent Martensitic Transformation in a Low-alloy TRIP Steel

Yasutomi Takashi, Kawata Hiroyuki, Kaido Hiroshi, Sakurada Eisaku, Yonemura Shigeru, Hiwatashi Shunji, Shoji Hiroto, Ohata Mitsuru

Tetsu-to-Hagane　Vol. 108　No. 9　p. 666-678　2022　Research paper (scientific journal)

Brittle fracture assessment of narrow weld part in steel pipe joint structure by using Weibull stress concept

SHIMIZU Kazuma, KUBOTA Kyohei, SHOJI Hiroto, ABE Yohei, NAKATANI Mitsuyoshi, OHATA Mitsuru, MINAMI Fumiyoshi

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY　Vol. 40　No. 3　p. 134-148　2022　Research paper (scientific journal)

Fracture dominant in friction stir spot welded joint between 6061 aluminum alloy and galvannealed steel based on microscale tensile testing

Tomoki Matsuda, Toshiya Ogaki, Kotaro Hayashi, Chihiro Iwamoto, Takashi Nozawa, Mitsuru Ohata, Akio Hirose

Materials & Design　p. 110344-110344　2021/12　Research paper (scientific journal)

The status of the Japanese material properties handbook and the challenge to facilitate structural design criteria for DEMO in-vessel components

Takashi Nozawa, Hiroyasu Tanigawa, Takaki Kojima, Takamoto Itoh, Noritake Hiyoshi, Mitsuru Ohata, Taichiro Kato, Masami Ando, Motoki Nakajima, Takanori Hirose, Jordan D. Reed, Xiang Chen, Josina W. Geringer, Yutai Katoh

Nuclear Fusion　Vol. 61　No. 11　2021/11　Research paper (scientific journal)

Friction stir spot welding of aluminum and carbon fiber reinforced thermoplastic using hybrid surface treatment improving interfacial properties

Eri Ota, Tomoki Matsuda, Hiroto Shoji, Tomo Ogura, Fumikazu Miyasaka, Tomokazu Sano, Mitsuru Ohata, Akio Hirose

Materials & Design　p. 110221-110221　2021/11　Research paper (scientific journal)

Loading mode effect on brittle fracture resistance of cracked component under large-scale yielding

Kazuma Shimizu, Mitsuru Ohata, Hiroto Shoji, Hiroyasu Tanigawa, Taichiro Kato

Mechanics of Materials　p. 104115-104115　2021/10　Research paper (scientific journal)

Fracture behavior of thermally aged Ag-Cu composite sinter joint through microscale tensile test coupled with nano X-ray computed tomography

Tomoki Matsuda, Seigo Yamada, Akihisa Takeuchi, Kentaro Uesugi, Masahiro Yasutake, Tomokazu Sano, Mitsuru Ohata, Akio Hirose

MATERIALS & DESIGN　Vol. 206　2021/08　Research paper (scientific journal)

Analysis of Local Fracture Driving Force for a Micro-crack under Combined Stress Field in Plastic Zone

Kazuma SHIMIZU, Mitsuru OHATA, Hiroto SHOJI, Hiroyasu TANIGAWA, Taichiro KATO

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY　Vol. 39　No. 3　p. 171-179　2021　Research paper (scientific journal)

Work Hardening and Fracture Strain Evaluation of Hardened SKD11 Steel Using Shear Punching Test

Takashi Matsuno, Kouta Nakagiri, Hiroto Shoji, Mitsuru Ohata

Forming the Future　p. 1999-2007　2021　Part of collection (book)

Texture evolution and fracture behavior of friction-stir-welded non-flammable Mg-Al-Ca alloy extrusions

Shin-ichi Inoue, Michiaki Yamasaki, Mitsuru Ohata, Shigeki Kakiuchi, Yoshihito Kawamura, Hidenori Terasaki

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 799　2021/01　Research paper (scientific journal)

A strain based criterion to assess ductile failure initiation in dented pipelines under tensile loading

Yerlin Andres Plata Uribe, Claudio Ruggieri, Mitsuru Ohata

JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN　2020/12　Research paper (scientific journal)

Microscale tensile test of galvannealed steel/aluminum dissimilar joint for estimation of intrinsic interfacial strength

Tomoki Matsuda, Tomokazu Sano, Masanao Munekane, Mitsuru Ohata, Akio Hirose

SCRIPTA MATERIALIA　Vol. 186　p. 196-201　2020/09　Research paper (scientific journal)

Effect of mismatch in mechanical properties on interfacial strength of aluminum alloy/steel dissimilar joints

Tomoki Matsuda, Ryoichi Hatano, Tomo Ogura, Reo Suzuki, Hiroto Shoji, Tomokazu Sano, Mitsuru Ohata, Akio Hirose

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 786　2020/06　Research paper (scientific journal)

Study on identification of critical Weibull stress distribution by using miniature specimen

SHIMIZU Kazuma, SHOJI Hiroto, KATO Taichiro, TANIGAWA Hiroyasu, OHATA Mitsuru

Transactions of the JSME (in Japanese)　Vol. 86　No. 886　p. 19-00438-19-00438　2020　Research paper (scientific journal)

Influence of interfacial structure on the fracture behavior of friction stir spot welded dissimilar joints

Tomoki Matsuda, Kiriko Owada, Asahi Numata, Hiroto Shoji, Tomokazu Sano, Mitsuru Ohata, Akio Hirose

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　Vol. 772　p. 138743-138743　2020/01　Research paper (scientific journal)

Prediction of ductile crack growth resistance using mechanical properties of material

YAMADA Takehisa, OHATA Mitsuru

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY　Vol. 38　No. 2　p. 85-94　2020　Research paper (scientific journal)

Application of damage model based on boid growth analysis to ductile crack growth simulation

YAMADA Takehisa, OHATA Mitsuru

Quarterly Journal of the Japan Welding Society　Vol. 37　No. 3　p. 115-124　2019/07　Research paper (scientific journal)

Fracture assessment of weld joints of high-strength steel in pre-strained condition

Gyubaek An, Jeongung Park, Mitsuru Ohata, Fumiyoshi Minami

Applied Sciences (Switzerland)　Vol. 9　No. 7　2019/04　Research paper (scientific journal)

Unit cellによるボイド成長解析に基づく延性ダメージモデル

山田剛久, 大畑 充

溶接学会論文集　Vol. 37　No. 1　p. 59-67　2019/03　Research paper (scientific journal)

Assessment of finite element analyses of load mode (bending vs. tension) effects for mitigation of judgment on pop-ins caused by splits

Sohei Kanna, Yoichi Yamashita, Tomoya Kawabata, Tetsuya Tagawa, Yasuhito Imai, Yoshiki Mikami, Houichi Kitano, Yoichi Kayamori, Tomoyuki Tonan, Tsuyoshi Sakurai, Shigetoshi Kyono, Mitsuru Ohata, Fumiyoshi Minami, Shuji Aihara, Yukito Hagihara

ENGINEERING FRACTURE MECHANICS　Vol. 205　p. 28-39　2019/01　Research paper (scientific journal)

A study on the effect of material properties on the characteristics of ductile crack initiation limit

YAMADA Takehisa, OHATA Mitsuru

Quarterly Journal of the Japan Welding Society　Vol. 36　No. 4　p. 285-292　2018/12　Research paper (scientific journal)

Study on Fracture Modeling to Predict Brittle Fracture Resistance under Mixed Mode Loading

Kazuma SHIMIZU, Hiroto SHOJI, Taichiro KATO, Hiroyasu TANIGAWA, Mitsuru OHATA

Quarterly Journal of the Japan Welding Society　Vol. 36　No. 4　p. 274-284　2018/12　Research paper (scientific journal)

Investigation on eta and m factors for J integral in SE(B) specimens

Tomoya Kawabata, Tetsuya Tagawa, Yoichi Kayamori, Yoshiki Mikami, Houichi Kitano, Tomoyuki Tonan, Yasuhito Imai, Sohei Kanna, Tsuyoshi Sakurai, Shigetoshi Kyono, Mitsuru Ohata, Shuji Aihara, Fumiyoshi Minami, Yukito Hagihara

THEORETICAL AND APPLIED FRACTURE MECHANICS　Vol. 97　p. 224-235　2018/10　Research paper (scientific journal)

Pre-strain effect of on fracture performance of high-strength steel welds

Gyubaek An, Jeong-Ung Park, Mitsuru Ohata, Fumiyoshi Minami

Journal of Mechanical Science and Technology　Vol. 32　No. 7　p. 3145-3151　2018/03　Research paper (scientific journal)

Fracture assessment procedure developed in Japan for steel structures under seismic conditions

Fumiyoshi Minami, Yasuhito Takashima, Mitsuru Ohata, Yusuke Shimada, Takahiko Suzuki, Hiroshi Shimanuki, Satoshi Igi, Takumi Ishii, Masao Kinefuchi, Tetsuo Yamaguchi, Yukito Hagihara

ENGINEERING FRACTURE MECHANICS　Vol. 187　p. 142-164　2018/01　Research paper (scientific journal)

Numerical simulation of residual stress modification by reverse bending of notched fracture toughness test specimens of multipass welds

Yoshiki Mikami, Tomoya Kawabata, Tetsuya Tagawa, Houichi Kitano, Akira Kiuchi, Yoichi Kayamori, Sohei Kanna, Tsuyoshi Sakurai, Yasuhito Imai, Mitsuru Ohata, Masahito Mochizuki, Fumiyoshi Minami, Shuji Aihara, Yukito Hagihara

THEORETICAL AND APPLIED FRACTURE MECHANICS　Vol. 92　p. 214-222　2017/12　Research paper (scientific journal)

Effect of irradiation hardening on brittle fracture performance of box-shaped blanket fabricated by F-82H

Takeshi Miyazawa, Hiroyasu Tanigawa, Mitsuru Ohata

FUSION ENGINEERING AND DESIGN　Vol. 124　p. 1033-1037　2017/11　Research paper (scientific journal)

tudy on fracture mode of spot weld joint using continuum damage mechanics model

K. Ikushima, T Yano, R. Natsume, M. Shibahara, M. Ohata

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY　Vol. 35　No. 2　p. 28-32　2017/06　Research paper (scientific journal)

Applicability of new CTOD calculation formula to various a(0)/W conditions and B x B configuration

Tomoya Kawabata, Tetsuya Tagawa, Yoichi Kayamori, Mitsuru Ohata, Yoichi Yamashita, Masao Kinefuchi, Hitoshi Yoshinari, Shuji Aihara, Fumiyoshi Minami, Hiroshi Mimura, Yukito Hagihara

ENGINEERING FRACTURE MECHANICS　Vol. 179　No. 15　p. 375-390　2017/06　Research paper (scientific journal)

Plastic deformation behavior in SEB specimens with various crack length to width ratios

Tomoya Kawabata, Tetsuya Tagawa, Yoichi Kayamori, Mitsuru Ohata, Yoichi Yamashita, Masao Kinefuchi, Hitoshi Yoshinari, Shuji Aihara, Fumiyoshi Minami, Hiroshi Mimura, Yukito Hagihara

ENGINEERING FRACTURE MECHANICS　Vol. 178　p. 301-317　2017/06　Research paper (scientific journal)

Revision of ISO 27306 for CTOD Toughness Correction for Constraint Loss

Fumiyoshi Minami, Mitsuru Ohata, Yasuhito Takashima

Materials Science Forum　Vol. 879　p. 54-59　2017/01　Research paper (scientific journal)

Evaluation of impacts of stress triaxiality on plastic deformability of RAFM steel using various types of tensile specimen

Taichiro Kato, Mitsuru Ohata, Shuhei Nogami, Hiroyasu Tanigawa

FUSION ENGINEERING AND DESIGN　Vol. 109　p. 1631-1636　2016/11　Research paper (scientific journal)

Evaluation of Charpy impact toughness using side-grooved specimen for hybrid laser-arc welds of ultra-high-strength steel

Yasuhito Takashima, Mitsuru Ohata, Koutarou Inose, Hiroto Yamaoka, Yasumasa Nakanishi, Fumiyoshi Minami

WELDING IN THE WORLD　Vol. 60　No. 6　p. 1191-1199　2016/11　Research paper (scientific journal)

Proposal for a new CTOD calculation formula

Tomoya Kawabata, Tetsuya Tagawa, Takahiro Sakimoto, Yoichi Kayamori, Mitsuru Ohata, Yoichi Yamashita, Ei-ichi Tamura, Hitoshi Yoshinari, Shuji Aihara, Fumiyoshi Minami, Hiroshi Mimura, Yukito Hagihara

ENGINEERING FRACTURE MECHANICS　Vol. 159　p. 16-34　2016/07　Research paper (scientific journal)

WES 2808 for Brittle Fracture Assessment of Steel Components under Seismic Conditions-Part VI: Application of WES 2808 to Beam-to-Column Connections

Y. Takashima, M. Ohata, T. Ishii, Y. Hagihara, F. Minami

Structural Integrity Procedia (21st European Conference on Fracture)　Vol. 2　p. 1585-1592　2016/06　Research paper (international conference proceedings)

WES 2808 for Brittle Fracture Assessment of Steel Components under Seismic Conditions-Part I: Fracture Assessment Procedure

F. Minami, M. Ohata, Y. Takashima, H. Shimanuki, Y. Shimada, T. Suzuki, S. Igi, T. Ishii, M. Kinefuchi, T. Yamaguchi, T. Nakagomi, Y. Hagihara

Structural Integrity Procedia (21st European Conference on Fracture)　Vol. 2　p. 1561-1568　2016/06　Research paper (international conference proceedings)

Fracture Evaluation of Welded Joints with Embedded Flaw from Cold Cracking

Y. Imai, Y. Seko, M. Mitsuya, T. Hasegawa, M. Ohata, S. Aihara

Vol. 33　No. 4　p. 376-384　2016/01　Research paper (scientific journal)

Visualization of Microstructural Factor Resisting the Cleavage-Crack Propagation in the Simulated Heat-Affected Zone of Bainitic Steel

Hidenori Terasaki, Yu Miyahara, Mitsuru Ohata, Koji Moriguchi, Yusaku Tomio, Kotaro Hayashi

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　Vol. 46A　No. 12　p. 5489-5493　2015/12　Research paper (scientific journal)

Dynamic tensile properties of reduced-activation ferritic steel F82H

Ryuta Kasada, Daiki Ishii, Masami Ando, Hiroyasu Tanigawa, Mitsuru Ohata, Satoshi Konishi

FUSION ENGINEERING AND DESIGN　Vol. 100　p. 146-151　2015/11　Research paper (scientific journal)

Prediction of ductile fracture path in Charpy V-notch specimen for laser beam welds

M. Ohata, G. Morimoto, Y. Fukuda, F. Minami, K. Inose, T. Handa

Welding in the World　Vol. 59　No. 5　p. 667-674　2015/09/05　Research paper (scientific journal)

Effect of Close-Packed Plane Boundaries in a Bain Zone on the Crack Path in Simulated Coarse-Grained HAZ of Bainitic Steel

Hidenori Terasaki, Yutaro Shintome, Yu-Ichi Komizo, Mitsuru Ohata, Koji Moriguchi, Yusaku Tomio

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　Vol. 46A　No. 5　p. 2035-2039　2015/05　Research paper (scientific journal)

Simulation-based method for hierarchal material design to improve ductile crack growth resistance of structural component

Hiroto Shoji, Mitsuru Ohata, Fumiyoshi Minami

INTERNATIONAL JOURNAL OF FRACTURE　Vol. 192　No. 2　p. 167-178　2015/04　Research paper (scientific journal)

Ductile fracture mechanism for dual phase steel with high strength second phase

Hiroto Shoji, Keiichi Hino, Mitsuru Ohata, Yasuhiro Shinohara, Fumiyoshi Minami

Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society　Vol. 33　No. 4　p. 341-348　2015　Research paper (scientific journal)

Ultrafast Structural Dynamics of Shock-Compressed Iron Probed with XFEL

Tomokazu Sano, Tomoki Matsuda, Akio Hirose, Mitsuru Ohata, Tomoyuki Terai, Tomoyuki Kakeshita, Yuichi Inubushi, Takahiro Sato, Makina Yabashi, Tadashi Togashi, Kensuke Tono, Osami Sakata, Kazuto Arakawa, Yoshinori Tange, Takuo Okuchi, Tomoko Sato, Toshimori Sekine, Tsutomu Mashimo, Yukio Sano, Yuji Sano, Tomonao Hosokai, Takeshi Matsuoka, Toshinori Yabuuchi, Kazuo A. Tanaka, Hiroyuki Uranishi, Norimasa Ozaki, Ryosuke Kodama

2014/12

A Practical Analysisof Bulging Under Complex Quench Conditions

Toshiya Yamamoto, Kazuaki Arii, Shinta Niimoto, Mitsuru Ohata, Tetsuya Tagawa, Fumiyoshi Minami

Journal of Pressure Vessel Technology, ASME　p. 061401-1-061401-8　2014/12　Research paper (scientific journal)

Investigation of Bulging Behavior of Coke Drum-A Practical Analysis of Bulging Under Complex Quench Conditions

Toshiya Yamamoto, Kazuaki Arii, Shinta Niimoto, Mitsuru Ohata, Tetsuya Tagawa, Fumiyoshi Minami

JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME　Vol. 136　No. 6　2014/12　Research paper (scientific journal)

Experimental measurements of deformed crack tips in different yield-to-tensile ratio steels

Tetsuya Tagawa, Tomoya Kawabata, Takahiro Sakimoto, Yoichi Kayamori, Mitsuru Ohata, Yoichi Yamashita, Ei-ich Tamura, Hitoshi Yoshinari, Shuji Aihara, Fumiyoshi Minami, Hiroshi Mimura, Yukito Hagihara

ENGINEERING FRACTURE MECHANICS　Vol. 128　No. C　p. 157-170　2014/09　Research paper (scientific journal)

Load-carrying capacity of overmatched welded joint of stainless steel for building structure

Mitsuru Ohata, Shotaro Ueno, Takashi Namekata, Shigeki Satoh, Tsukasa Okazaki, Yasumi Shimura, Hirohisa Watanabe, Fumiyoshi Minami

WELDING IN THE WORLD　Vol. 58　No. 5　p. 743-753　2014/09　Research paper (scientific journal)

Investigation of Bulging Behavior of Coke Drum: Feasible Study on Causes of Bulging

Mitsuru Ohata, Nana Kawai, Tetsuya Tagawa, Fumiyoshi Minami, Toshiya Yamamoto, Kazuaki Arii, Shinta Niimoto

JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME　Vol. 136　No. 3　2014/06　Research paper (scientific journal)

Analysis of Statistical Scatter in Charpy Impact Toughness

Yasuhito Takashima, Mitsuru Ohata, Fumiyoshi Minami

Materials Science Forum　Vol. 783–786　p. 2394-2399　2014/05　Research paper (scientific journal)

Evaluation method for Charpy impact toughness of laser welds based on lateral contraction analysis

Yasuhito Takashima, Tatsuya Nishi, Hiroto Shoji, Mitsuru Ohata, Fumiyoshi Minami

WELDING IN THE WORLD　Vol. 58　No. 3　p. 289-295　2014/05　Research paper (scientific journal)

Prediction of the Effect of Micro-structural Characteristics of Two-Phase Steel on Ductile Properties Controlling Ductile Crack Growth Resistance of Structural Component

Hiroto Shoji, Mitsuru Ohata, Fumiyoshi Minami

TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN　Vol. 100　No. 5　p. 76-85　2014　Research paper (scientific journal)

Evaluation method for Charpy impact toughness of laser welds based on lateral contraction analysis

Yasuhito Takashima, Tatsuya Nishi, Hiroto Shoji, Mitsuru Ohata, Fumiyoshi Minami

Welding in the World　Vol. 58　No. 3　p. 289-295　2014　Research paper (scientific journal)

Prediction of ductile fracture path in Charpy V-notch specimen for laser beam welds

Mitsuru Ohata, Gaku Morimoto, Yuuya Fukuda, Fumiyoshi Minami, Koutarou Inose, Tsunehisa Handa

66th Annual Assembly of the International Institute of Welding, IIW Doc.X-1736-13　2013/09　Research paper (international conference proceedings)

Constraint-based assessment of fracture in welded components

Fumiyoshi Minami, Yasuhito Takashima, Mitsuru Ohata, Yoichi Yamashita

WELDING IN THE WORLD　Vol. 57　No. 5　p. 707-718　2013/09　Research paper (scientific journal)

Damage Caused by Dynamic/Cyclic Loading of a Detonation Chamber

Yasuhito Takashima, Mitsuru Ohata, Tetsuya Tagawa, Fumiyoshi Minami, Bart Simoens, Michel H. Lefebvre, Robert E. Nickell, Kenji Koide, Ryusuke Kitamura, Koichi Hayashi, Joseph K. Asahina

JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME　Vol. 135　No. 4　2013/08　Research paper (scientific journal)

Hierarchical damage simulation to correlate micro-structural characteristics of steel with ductile crack growth resistance of component

Mitsuru Ohata, Hiroto Shoji, Fumiyoshi Minami

13th International Conference on Fracture 2013, ICF 2013　Vol. 7　p. 6033-6042　2013　Research paper (international conference proceedings)

3D-simulation of Ductile Damage Evolution in Multi-phase Steel with Heterogeneous Microstructures

Mitsuru Ohata, Hiroto Shoji, Fumiyoshi Minami

TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN　Vol. 99　No. 9　p. 573-581　2013　Research paper (scientific journal)

Tensile Strength of Overmatched Welded Joint of Stainless Steel for Building Structure

Mitsuru OHATA, Shotaro UENO, Takashi NAMEKATA, Shigeki SATOH, Tsukasa OKAZAKI, Yasumi SHIMURA, Hirohisa WATANABE, Fumiyoshi MINAMI

Steel Construction Engineering　2012/12　Research paper (scientific journal)

Equivalent CTOD Ratio beta for Engineering Assessment of CTOD Correction for Constraint Loss

Mitsuru Ohata, Fumiyoshi Minami

JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME　Vol. 134　No. 5　2012/10　Research paper (scientific journal)

Weibull Stress Based assessment of fracture toughness requirement for multi-pass weld metals

Yasuhito Takashima, Mitsuru Ohata, Fumiyoshi Minami

2012/09

Effect of Morphology of Microstructure of Two-phase Steel on Ductile Crack Growth Resistance

Mitsuru Ohata

2012/09

Load Carring Capacity of Overatched Welded Joint of Stainless Steel For Building Structure

Mitsuru Ohata, Shotaro UENO, Takashi NAMEKATA, Shigeki SATOH, Tsukasa OKAZAKI, Yasumi SHIMURA, Hirohisa WATANABE, Fumiyoshi MINAMI

2012/07　Research paper (international conference proceedings)

Constraint-Based Assessment of Fracture of Welded Components

Fumiyoshi Minami, Yasuhito Takashima, Mitsuru Ohata, Yoichi Yamashita

IIW Document　2012/07　Research paper (international conference proceedings)

Effect of Mechanical Properties on Tensile Strain Limit for Leakage of High-Pressure Pipe with Surface Crack

Mitsuru Ohata, Yusuke Takada, Fumiyoshi Minami, Takahiro Sakimoto, Satoshi Igi, Shigeru Endo

INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING　Vol. 22　No. 2　p. 157-164　2012/06　Research paper (scientific journal)

Constraint assessment of brittle fracture of steel components, ISO 27306 vs. FITNET FFS

Fumiyoshi Minami, Mitsuru Ohata

ENGINEERING FRACTURE MECHANICS　Vol. 84　p. 67-82　2012/04　Research paper (scientific journal)

Evaluation of fracture toughness test data for multilayer dissimilar joint welds using a weibull stress model

Yasuhito Takashima, Mitsuru Ohata, Masaru Seto, Yoshitomi Okazaki, Fumiyoshi Minami

Journal of ASTM International　Vol. 9　No. 3　2012/03　Research paper (scientific journal)

Evaluation of fracture toughness test data for multilayer dissimilar joint welds using a Weibull stress model

Yasuhito Takashima, Mitsuru Ohata, Masaru Seto, Yoshitomi Okazaki, Fumiyoshi Minami

ASTM Special Technical Publication　Vol. 1546　p. 357-376　2012　Research paper (international conference proceedings)

Weibull Model for Hydrogen-induced Fracture of High Strength Steel

Mitsuru Ohata, Tomohiko Omura, Fumiyoshi Minami

ISIJ INTERNATIONAL　Vol. 52　No. 2　p. 323-328　2012　Research paper (scientific journal)

Fractography of burst-tested linepipe

Tetsuya Tagawa, Satoshi Igi, Shinobu Kawaguchi, Mitsuru Ohata, Fumiyoshi Minami

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING　Vol. 89　p. 33-41　2012/01　Research paper (scientific journal)

INVESTIGATION OF BULGING BEHAVIOR OF COKE DRUM -FEASIBLE STUDY ON CAUSES OF BULGING

Mitsuru Ohata, Nana Kawai, Tetsuya Tagawa, Fumiyoshi Minami, Toshiya Yamamoto, Kazuaki Arii, Shinta Niimoto

PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE (PVP-2011), VOL 4　Vol. 4　p. 509-+　2012　Research paper (international conference proceedings)

DAMAGE CAUSED BY DYNAMIC/CYCLIC LOADING OF DETONATION CHAMBER

Yasuhito Takashima, Mitsuru Ohata, Tetsuya Tagawa, Bart Simoens, Michel H. Lefebvre, Robert E. Nickell, Kenji Koide, Ryusuke Kitamura, Koichi Hayashi, Joseph K. Asahina, Fumiyoshi Minami

PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE (PVP-2011), VOL 5　Vol. 5　p. 105-+　2012　Research paper (international conference proceedings)

Prediction of Tensile Strain Limit for Leak of High Pressure Pipe with Surface Crack

Mitsuru Ohata, Ryo Yamaguchi, Fumiyoshi Minami, Takahiro Sakimoto, Satoshi Igi

Journal of High Pressure Institute of Japan　Vol. 49　No. 4　p. 2-10　2011/07　Research paper (scientific journal)

The Influence of Internal Pressure on Ductile Fracture from a Circumferential Surface Defect on a Pipe

Takahiro Sakimoto, Satoshi Igi, Shigeru Endo, Mitsuru Ohata, Fumiyoshi Minami

Journal of High Pressure Institute of Japan　Vol. 49　No. 4　p. 11-18　2011/07　Research paper (scientific journal)

Effect of Mechanical Properties on Tensile Strain Limit for Leak of High-Pressure Pipe with Surface Crack

Mitsuru Ohata, Yusuke Takada, Takahiro Sakimoto, Satoshi Igi, Shigeru Endo, Fumiyoshi Minami

Proc. 21st International Offshore and Polar Engineering Conference　2011/06　Research paper (international conference proceedings)

Constraint-Based Assessment of CTOD Toughness Requirement for High-Strain Line Pipe

Fumiyoshi Minami, Yasuhito Takashima, Mitsuru Ohata

INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING　Vol. 21　No. 2　p. 129-140　2011/06　Research paper (scientific journal)

Constraint-based assessment of CTOD toughness requirement for high-strain line pipe

Fumiyoshi Minami, Yasuhito Takashima, Mitsuru Ohata

Proceedings of the International Offshore and Polar Engineering Conference　p. 674-681　2011　Research paper (international conference proceedings)

Now and Then of Welding Science and Technology

Manabu Tanaka, Mitsuru Ohata, Kazuyuki Suenaga

J. Japan Welding Soc.　Vol. 80　No. 1　p. 5-11　2011/01

Damage caused by dynamic/cyclic loading of detonation chamber

Yasuhito Takashima, Mitsuru Ohata, Tetsuya Tagawa, Bart Simoens, Michel H. Lefebvre, Robert E. Nickell, Kenji Koide, Ryusuke Kitamura, Koichi Hayashi, Joseph K. Asahina, Fumiyoshi Minami

American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP　Vol. 5　p. 105-112　2011　Research paper (international conference proceedings)

材料組織と延性破壊特性の相互シミュレーション

大畑 充

「構造材料の破壊特性と組織因子」講演論文集　2010/09

Weibull Model For Hydrogen-Induced Fracture of High Strength Steel

Mitsuru Ohata, Naoki Takeda, Kouji Imanishi, T. Omura, Fumiyoshi Minami

Proceedings of 18th European Conference on Fracture –Fracture of Materials and Structures from Micro to Macro Scale　Vol. 52　No. 2　p. 323-328　2010/09　Research paper (international conference proceedings)

Application of Equivalent CTOD Ratio to Fracture Assessment of Structural Components

Satoshi Igi, Mitsuru Ohata, Fumiyoshi Minami

JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME　Vol. 132　No. 4　2010/08　Research paper (scientific journal)

Damage Model for Predicting the Effect of Steel Properties on Ductile Crack Growth Resistance

Mitsuru Ohata, Takuya Fukahori, Fumiyoshi Minami

INTERNATIONAL JOURNAL OF DAMAGE MECHANICS　Vol. 19　No. 4　p. 441-459　2010/05　Research paper (scientific journal)

Crack Geometry Effect on Stress-Strain Fields for Crack Under Biaxial Loading

Fumiyoshi Minami, Mitsuru Ohata, Daisuke Watanabe, Satoshi Igi, Takahiro Kubo, Nobuhisa Suzuki

JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME　Vol. 132　No. 1　p. 685-693　2010/02　Research paper (scientific journal)

Difference between ASTM E1290 and BS 7448 CTOD estimation procedures

T. Tagawa, Y. Kayamori, M. Ohata, Y. Yamashita, T. Handa, T. Kawabata, K. Tsutsumi, H. Yoshinari, S. Aihara, Y. Hagihara

Welding in the World　Vol. 54　No. 7-8　p. R182-R188　2010　Research paper (scientific journal)

Comparison of CTOD standards: BS 7448-Part 1 and revised ASTM E1290

Tetsuya Tagawa, Yoichi Kayamori, Mitsuru Ohata, Tsunehisa Handa, Tomoya Kawabata, Yoichi Yamashita, Kazuyuki Tsutsumi, Hitoshi Yoshinari, Shuji Aihara, Yukito Hagihara

ENGINEERING FRACTURE MECHANICS　Vol. 77　No. 2　p. 327-336　2010/01　Research paper (scientific journal)

3D-Simulation of ductile failure in two-phase structural steel with heterogeneous microstructure

M. Ohata, M. Suzuki, A. Ui, F. Minami

Engineering Fracture Mechanics　Vol. 77　No. 2　p. 277-284　2010/01　Research paper (scientific journal)

FRACTURE PERFORMANCE EVALUATION OF LASER BEAM WELDED JOINTS BASED ON THE WEIBULL STRESS CRITERION

Yasuhito Takashima, Mitsuru Ohata, Fumiyoshi Minami

ASME PRESSURE VESSELS AND PIPING CONFERENCE 2009, VOL 3: DESIGN AND ANALYSIS　p. 551-556　2010　Research paper (international conference proceedings)

Strength-mismatch effect on steel weld HAZ-toughness in CTOD and Charpy tests

Y. Chiba, K. Murayama, S. Satoh, K. Miyashiro, M. Ohata, F. Minami

Welding in the World　Vol. 54　No. 5-6　p. R147-R153　2010　Research paper (scientific journal)

Analysis of Criterion for Ductile Crack Initiation of High Strength Steels under Cyclic Loading

Hitoshi Sueyoshi, Nobuyuki Ishikawa, Mitsuru Ohata

Materials Science & Technology　2009/10　Research paper (international conference proceedings)

Prediction of Tensile Strain Limit for Leak of High Pressure Pipe with Surface Crack

Mitsuru Ohata, Satoshi Igi, Ryo Yamaguchi, Takahiro Sakimoto, Takahiro Kubo, Fumiyoshi Minami

Proceedings of Pipeline Technology Conference　2009/10　Research paper (international conference proceedings)

Fracture Assessment of HAZ-Notched Joints Considering Strength Mis-Match

Yasutake Chiba, Keiji Murayama, Susumu Satoh, Kyohsuke Miyasiro, Mitsuru Ohata, Fumiyoshi Minami

62nd Annual Assembly of the International Institute of Welding Document　2009/07　Research paper (international conference proceedings)

CRACK GEOMETRY EFFECT ON STRESS-STRAIN FIELDS FOR CRACK UNDER BIAXIAL LOADING

Fumiyoshi Minami, Mitsuru Ohata, Daisuke Watanabe, Satoshi Igi, Takahiro Kubo, Nobuhisa Suzuki

IPC2008: PROCEEDINGS OF THE ASME INTERNATIONAL PIPELINE CONFERENCE - 2008, VOL 3　p. 685-+　2009　Research paper (international conference proceedings)

Significance of strength mismatch in fracture performance evaluation of welded joints - Characterization of mismatch effect by the Weibull stress criterion

Fumiyoshi Minami, Mitsuru Ohata, Takamasa Manabe, Yasutake Chiba, Keiji Murayama

Welding in the World　Vol. 53　No. 5-6　p. R140-R150　2009　Research paper (scientific journal)

Fracture toughness evaluation of laser beam-welded joints of 780 MPa-strength class steel

Yasuhito Takashima, Mitsuru Ohata, Fumiyoshi Minami

Welding in the World　Vol. 53　No. 11-12　p. R304-R311　2009　Research paper (scientific journal)

RELATIONSHIP BETWEEN WEIBULL PARAMETER AND FRACTURE TOUGHNESS OF STRUCTURAL STEELS

Tsunehisa Handa, Mitsuru Ohata, Hiroshi Mimura, Fumiyoshi Minami

PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE, VOL 1　Vol. 1　p. 915-922　2009　Research paper (international conference proceedings)

STANDARDIZATION OF CTOD TOUGHNESS CORRECTION FOR CONSTRAINT LOSS IN STEEL COMPONENTS

Fumiyoshi Minami, Mitsuru Ohata

PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE, VOL 1　p. 845-853　2009　Research paper (international conference proceedings)

Significance of strength mismatch in fracture performance evaluation of welded joints - Characterization of mismatch effect by the Weibull stress criterion

Fumiyoshi Minami, Mitsuru Ohata, Takamasa Manabe, Yasutake Chiba, Keiji Murayama

Welding in the World　Vol. 53　No. 5-6　p. R140-R150　2009　Research paper (scientific journal)

Fracture assessment procedure for structural components under cyclic and dynamic loading

Fumiyoshi Minami, Mitsuru Ohata, Daisuke Watanabe

INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING　Vol. 18　No. 3　p. 196-203　2008/09　Research paper (scientific journal)

Fracture Toughness Evaluation of Laser Beam Welded Joints of 780MPa Strength Class Steel

Yasuhito Takashima, Mitsuru Ohata, Fumiyoshi Minami

61th annual assembly International Institute of Welding　2008/07

Method for Predicting Fracture Toughness Transition Temperature from Charpy Impact test Based on Fracture Mechanics Analysis

Yasuhito Takashima, Mitsuru Ohata, Fumiyoshi Minami

Journal of the Japan Society of Naval Architects and Ocean Engineers　No. 7　p. 271-282　2008/06　Research paper (scientific journal)

Fracture Toughness and Microstructure of Laser Weld Metal of 780MPa Class High Tensile Strength Steel Plates, - Improvement of Steel Structural Performance by Laser Beam Welding for Mid-Thick Section Steel Plate -

Tsunehisa Handa, Koutarou Inose, Susumu Tsukamoto, Fumiyoshi Minami, Mitsuru Ohata, Yukito Hagihara

Quarterly Journal of the Japan Welding Society　2008/02　Research paper (scientific journal)

Damage model for simulating the effect of material properties on ductile crack growth resistance - Simulation of ductile crack growth

Takuya Fukahori, Mitsuru Ohata, Fumiyoshi Minami, Yoichi Kayamori, Takehiro Inoue

TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN　Vol. 94　No. 6　p. 222-230　2008　Research paper (scientific journal)

Mechanical properties controlling ductile crack growth of structural steel - Simulation of ductile crack growth

Mitsuru Ohata, Takuya Fukahori, Fumiyoshi Minami

TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN　Vol. 94　No. 2　p. 57-65　2008　Research paper (scientific journal)

Significance of fracture toughness test results of beam welds in evaluation of brittle fracture performance of girth welded pipe joints

Mitsuru Ohata, Masao Toyoda, Nobuyuk Ishikawa, Toyohisa Shinmiya

JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME　Vol. 129　No. 4　p. 609-618　2007/11　Research paper (scientific journal)

Critical Condition of Ductile Crack Extension and Subsequent Brittle Fracture for High Strength Steel

Tomoya Kawabata, Mitsuru Ohata, Fumiyoshi Minami

Journal of the Japan Society of Naval Architects and Ocean Engineers　No. 5　p. 235-243　2007/06　Research paper (scientific journal)

Fracture Mechanics Assessment of Beam-to-Column Joints Subjected to Cyclic and Dynamic Loading

Fumiyoshi Minami, Mitsuru Ohata

Welding in the World　2007/05　Research paper (scientific journal)

Significance of Fracture Toughness of Laser Welds for Structural Steels and Fracture Assessment by Weibull StressCriterion, - Improvement of Steel Structural Performance by Laser Beam Welding for Mid-Thick Section Steel Plates -

Fumiyoshi Minami, Mitsuru Ohata, akihiko Tanizawa, Yukito Hagihara, Susumu Tsukamoto, Tsunehisa Handa, Kohtaro Inose

Quarterly Journal of the Japan Welding Society　2007/02　Research paper (scientific journal)

Toughness evaluation of laser welds using side-grooved charpy test-improvement of steel structural performance by laser beam welding for mid-thick section steel plate

Yukito Hagihara, Kenichi Takai, Susumu Tsukamoto, Goro Arakane, Fumiyoshi Minami, Mitsuru Ohata, Koutarou Inose, Tsunehisa Handa

Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society　Vol. 25　No. 1　p. 165-172　2007　Research paper (scientific journal)

Evaluation Model for Assessing the Effect of Steel Properties on Correlation between Fracture Transition Temperatures in Charpy Impact Testing and CTOD Toughness Testing

Mitsuru Ohata, Yasunori Sawa, Yasuhito Takashima, Fumiyoshi Minami

Journal of the Japan Society of Naval Architects and Ocean Engineers　No. 4　p. 277-286　2006/12　Research paper (scientific journal)

Fracture Mechanics Assessment of Beam-to-Column Joints Subjected to Cyclic and Dynamic Loading

Fumiyoshi Minami, Mitsuru Ohata

Proc. 4th International Symposium on Steel Structures　2006/11　Research paper (international conference proceedings)

Evaluation Method of Fracture Performance of Welded Joint Based on the Weibulle Stress Concept

MANABE Takamasa, OHATA Mitsuru, MINAMI Fumiyoshi

Proc. of Welding Mechanics and Design Symposium 2006　2006/11

Weibull Stress Approach to Evaluate Charpy Impact Toughness in the Lower Fracture Toughness Range

Yasuhito TAKASHIMA, Yoichi TANIKAWA, Mitsuru OHATA, Fumiyoshi MINAMI

Proc. of Welding Mechanics and Design Symposium 2006　2006/11

Fracture Assessment of Steel Components with Geometrical Discontinuity Using the Weibull Stress

Satoshi IGI, Masayoshi KURIHARA, Mitsuru OHATA, Fumiyoshi MINAMI

Proc. of Welding Mechanics and Design Symposium 2006　2006/11

Application of Equivalent CTOD ratio β to Fracture Assessment of Cracked Structural Components Subjected to Bi-axial Loading based on the Weibull Stress Criterion

Hiroshi SHIMANUKI, Mitsuru Ohata, Fumiyoshi MINAMI

Proc. of Welding Mechanics and Design Symposium 2006　2006/11

Modified equation to predict leak/rupture criteria for axially through-wall notched X80 and X100 linepipes having a higher charpy energy

Shinobu Kawaguchi, Naoto Hagiwara, Mitsuru Ohata, Masao Toyoda

Journal of Pressure Vessel Technology, Transactions of the ASME　Vol. 128　No. 4　p. 572-580　2006/11　Research paper (scientific journal)

Method of Constraint Loss Correction of CTOD Fracture Toughness for Fracture Assessment of Steel Components

Fumiyoshi Minami, Mitsuru Ohata, Hiroshi Shimanuki, Tunehisa Handa, Satoshi Igi, Masayoshi Kurihara, Tomoya Kawabata, Youichi Yamashita, Tetsuya Tagawa, Yukito Hagihara

Engineering Fracture Mechanics, vol. 73, pp.1996-2020　Vol. 57　No. 8　p. 113-116　2006/09　Research paper (scientific journal)

Fracture Mechanics Assessment of Beam-to-Column Joints Subjected to Cyclic and Dynamic Loading

Fumiyosi Minami, Mitsuru Ohata

IIW, Doc. X-1596-2006　2006/08　Research paper (international conference proceedings)

Method of Constraint Loss Correction of CTOD Fracture Toughness for Fracture Assessment of Steel Components

Fumiyoshi Minami, Mitsuru Ohata, Hiroshi Shimanuki, Tsunehisa Handa, Satoshi Igi, M. Kurihara, Tomoya Kawabata, T. Yamashita, Tetsuya Tagawa, Yukito Hagihara

Proceedings of 9th International Conference of EMMC -Local Approach to Fracture-, pp.69-74　Vol. 57　No. 8　p. 113-116　2006/05　Research paper (international conference proceedings)

高歪繰返し荷重下での延性き裂発生限界評価手法 -ラインパイプの性能規定型設計に向けた安全性評価への展開-

大畑 充, 豊田政男

材料とプロセス　2006/03　Research paper (scientific journal)

Effect of dynamic loading on ductile crack initiation behaviour of notched specimen with strength mismatch

G. B. An, M. Ohata, J. U. Park, M. Toyoda

Science and Technology of Welding and Joining　Vol. 11　No. 1　p. 75-80　2006/02　Research paper (scientific journal)

Evaluation method for fracture mechanics-based material toughness from charpy impact test

Yasuhito Takashima, Mitsuru Ohata, Fumiyoshi Minami

ADVANCED STRUCTURAL AND FUNCTIONAL MATERIALS DESIGN, PROCEEDINGS　Vol. 512　p. 61-66　2006　Research paper (scientific journal)

Damage Mechanism for Controlling Ductile Cracking of Structural Steel with Heterogeneous Microstructure

Mitsuru Ohata, Masao Toyoda

Materials Science Forum, Vol.512, pp.31-36　Vol. 512　p. 31-36　2006/01　Research paper (scientific journal)

Constraint Loss Correction of CTOD Fracture Toughness for Fracture Assessment of Steel Components

Fumiyoshi Minami, Mitsuru Ohata, Yukito Hagihara

Proceedings of the International Conference on Welding Science and Engineering　2005/10　Research paper (international conference proceedings)

Effect of Strength Mismatch on Ductile Crack Initiation Behavior of Notch Root under Static Loading

Gyu-Baek An, Mitsuru Ohata, Masahito Mochizuki, Han-Sur Bang, Masao Toyoda

Key Engineering Materials, Trans Tech Publication Ltd., Uetikon-Zuerich, Switzerland, ISBN 0-87849-978-4, Vols. 297-300, pp. 756-761　2005/08　Research paper (scientific journal)

Transferability of critical condition for ductile cracking in bent small scale specimen to evaluation of critical internal pressure for ductile cracking in axially notched linepipe

S. Kawaguchi, N. Hagiwara, M. Ohata, M. Toyoda

Science and Technology of Welding and Joining　Vol. 10　No. 4　p. 488-489　2005/07　Research paper (scientific journal)

Ductile cracking criterion for high strength linepipe girth welds and strain-base design

Nobuyuki Ishikawa, Shigeru Endo, Satoshi Igt, Masao Toyoda, Mitsuru Ohata

Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society　Vol. 23　No. 2　p. 311-318　2005　Research paper (scientific journal)

Effect of Strength Mismatch on Ductile Crack Initiation Behavior from Notch Root

Mitsuru Ohata, Masao Toyoda, G-B. An

Welding in the World　Vol. 48　No. 11　p. 9-13　2004/12　Research paper (scientific journal)

Investigation of Effective Damage Evaluation Under Repeated Prestraining of Tension and Compression in 780MPa Class High Tensile Steel Plate - Studies of Safety Against Fracture on 780MPa Class High Tensile Strength Steel Plate After Prestrain (Report 3)

Tomoya Kawabata, Kazushige Arimochi, Mitsuru Ohata, Masahito Mochizuki, Masao Toyoda

Quarterly Journal of the Japan Welding Society (in Japanese), Vol. 22, No. 4, pp. 515-523　2004/11　Research paper (scientific journal)

Effect of Strength Mismatch on Ductile Crack Initiation Behavior of Notch Root under Static Loading

Gyu-Baek An, Mitsuru Ohata, Masahito Mochizuki, Han-Sur Bang, Masao Toyoda

Asian-Pacific Conference on Fracture and Strength '04, Jeju, Korea, No. TS08-03　2004/10

Modified equation to predict leak/rupture criteria for axially through-wall notched X80 and X100 linepipes having higher charpy energy

Shinobu Kawaguchi, Naoto Hagiwara, Mitsuru Ohata, Masao Toyoda

Proceedings of the Biennial International Pipeline Conference, IPC　Vol. 2　p. 1823-1832　2004　Research paper (international conference proceedings)

Application to ductile cracking evaluation for beam-to-column connection of steel pier - Evaluation of ductile crack initiation for welded structures subjected to large scale cyclic loading (report 2)

Osamu Yasuda, Masahiko Hirono, Masanori Terai, Mitsuru Ohata, Masao Toyoda

Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society　Vol. 22　No. 3　p. 467-476　2004　Research paper (scientific journal)

Applicability of the critical condition for ductile cracking of linepipe steel to the evaluation of ductile cracking of an axially notched linepipe

Shinobu Kawaguchi, Mitsuru Ohata, Yusuke Oki, Gen Ogita, Naoto Hagiwara, Masao Toyoda

Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society　Vol. 22　No. 2　p. 282-290　2004　Research paper (scientific journal)

Damage Concept for Evaluating Ductile Cracking of Steel Structure Subjected to Large-Scale Cyclic Straining

Mitsuru Ohata, Masao Toyoda

Science and Technology of Advanced Materials, Vol.5, pp.241-249　2004/01　Research paper (scientific journal)

Analytical Examination of Ductile Crack Initiation with Strength Mismatch under Dynamic Loading - Criterion for Ductile Crack Initiation Effect of Strength Mismatch and Dynamic Loading

Gyu-Baek An, Mitsuru Ohata, Masahito Mochizuki, Han-Sur Bang, Masao Toyoda

Journal of the Korean Welding Society (in Korean), Vol. 21, No. 7, pp. 755-764　2003/12

Criterion for Ductile Cracking of Structural Steel under Cyclic Loading ミEvaluation of Ductile Crack Initiation for Welded Structures Subjected to Large Scale Cyclic Loading (Report 1)-

Mitsuru Ohata, Masaki Yokota, Masahiko Hirono, Osamu Yasuda, Masao Toyoda

Quarterly Journal of the Japan Welding Society, Vol.21, No.4, pp.592-602　Vol. 21　No. 4　p. 592-602　2003/11　Research paper (scientific journal)

Effect of Geometrical Discontinuity on Ductile Fracture Initiation Behavior under Static Loading

G-B. An, Mitsuru Ohata, Masao Toyoda

International Journal of Korean Welding Society, Vol.3, No.1, pp.51-56　2003/11　Research paper (scientific journal)

Characteristics of Strength and Fracture in Strength Mismatched Joint by Dynamic Loading

Gyu-Baek An, Masahito Mochizuki, Mitsuru Ohata, Han-Sur Bang, Masao Toyoda

Journal of the Korean Welding Society, Vol. 21, No. 6, pp. 661-669　2003/10

Investigation on Enhancement of Uniform Elongation in 780 MPa Class High Tensile Strength Steel Plate - Studies of Safety against Fracture on 780 MPa Class High Tensile Strength Steel Plate after Prestrain (Report 2)

Tomoya Kawabata, Kazushige Arimochi, Mitsuru Ohata, Masahito Mochizuki, Masao Toyoda

Quarterly Journal of the Japan Welding Society, Vol. 21, No. 3, pp. 433-441　2003/08　Research paper (scientific journal)

Effect of Weld HAZ Softening on Tensile Strength - Studies on Deformation and Strength in Welded Joints of Fine Grain Steel (Report 1)

Tatsuya Shintomi, Ichiro Chikushi, Yoshikazu Hashimoto, Mitsuru Ohata, Masahito Mochizuki, Masao Toyoda

Quarterly Journal of the Japan Welding Society, Vol. 21, No. 3, pp. 397-403　2003/08　Research paper (scientific journal)

Thermal Elastic-Plastic Analysis of Strength Considering Temperature Rise due to Plastic Deformation by Dynamic Loading in Welded Joint

Gyu-Baek An, Masahito Mochizuki, Mitsuru Ohata, Hur-Sung Bang, Masao Toyoda

Journal of the Korean Welding Society, Vol. 21, No. 3, pp. 324-333　2003/05

A micromechanics approach to assess ductile crack initiation in damaged pipelines

Claudio Ruggieri, Mitsuru Ohata, Fernando F. Santos, Masao Toyoda

American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP　Vol. 461　p. 79-88　2003　Research paper (international conference proceedings)

Effect of strength mis-match and dynamic loading on ductile fracture initiation

G. B. An, M. Ohata, M. Toyoda

Engineering Fracture Mechanics　Vol. 70　No. 11　p. 1359-1377　2003　Research paper (scientific journal)

Brittle Fracture Property of Structural Steel after Large Crack Growth by Cyclic Loading Brittle Fracture Evaluation of Steel Components Subjected to Large Scale Cyclic Loading (Part 3)

Mitsuru Ohata, Shigefumi Matsumura, Fumiyoshi Minami, Hiroshi Shimanuki, Masao Toyoda

Jl. Soc. Naval Archit. Japan, Vol.192, pp.573-581　No. 192　p. 573-581　2002/11　Research paper (scientific journal)

Investigation on Enhancement of Uniform Elongation in 780MPa Class High Tensile Strength Steel Plate

Tomoya Kawabata, Kazushige Arimochi, Mitsuru Ohata, Masahito Mochizuki, Masao Toyoda

Proceedings of the 2002 National Symposium on Welding Mechanics and Design (in Japanese), Japan Welding Society, Suita, Japan, pp. 311-317　2002/11

Behavior of Deformation in 780 MPa Class High Tensile Strength Steel Plate after Prestrain Study of Safety Against Fracture on 780 Mpa Class High Tensile Strength Steel Plate after Prestrain (Report 1)-

Tomoya Kawabata, Kazushige Arimochi, Mitsuru Ohata, Masahito Mochizuki, Masao Toyoda

Quarterly Journal of the Japan Welding Society (in Japanese), Vol. 20, No. 3, pp. 398-407　2002/08　Research paper (scientific journal)

Strength Mismatch Effect on Ductile Crack Initiation from Notch Root of Structural Steel

Gyu-Baek An, Satoshi Yoshida, Mitsuru Ohata, Masao Toyoda

Journal of the Japan Society of Naval Architects and Ocean Engineers　No. 190　p. 579-590　2001/11　Research paper (scientific journal)

Brittle Fracture Controlling Parameter of Structural Steels after Large Crack Growth by Cyclic Loading -Brittle Fracture Evaluation of Steel Components Subjected to Large Scale Cyclic Loading (Part 2)-

Mitsuru Ohata, Fumiyoshi Minami, Syusuke Fujita, Masaaki Hashimoto, Masao Toyoda

Vol. 190　p. 579-590　2001/11　Research paper (scientific journal)

Ductile Crack Initiation in the Root Weld Metal of HSLA Welded Joint

Maks Oblak, Zdravko Praunseis, Ivan Gubensek, Masao Toyoda, Mitsuru Ohata

Proceedings of the Second Slovenian-Japanese Joint Seminar, Bohinj, Slovenia　2001/10　Research paper (international conference proceedings)

Criterion for Evaluation of Ductile Cracking of Steel Structure under Large Scale Cyclic Loading

Osamu Yasuda, Masahiko Hirono, Masaki Yokota, Mitsuru Ohata, Masao Toyoda

Proceedings of the 7th International Welding Symposium　2001/10　Research paper (international conference proceedings)

Effect of Strength Mismatch and Dynamic Loading on Criterion for Ductile Crack Initiation

Masao Toyoda, Gyu-Baek An, Mitsuru Ohata, Satoshi Yoshida, Zdravko Praunseis

IIW Doc.X-1477　No. 189　p. 375-386　2001/07　Research paper (international conference proceedings)

The Role and Formation of Martensite-Austenite Constituents in HSLA Welded Joints

Zdravko Praunseis, Masao Toyoda, Alojz Kriman, Mitsuru Ohata

2001/07　Research paper (scientific journal)

The Influence of Soft Root on Fracture Behaviors of High-Strength, Low-Alloyed (HSLA) Steel Weldments

Zdravko Praunseis, T. Sundararajan, Masao Toyoda, Mitsuru Ohata

Materials and Manufacturing Processes　2001/06　Research paper (scientific journal)

Criterion for Ductile Cracking for the Evaluation of Steel Structure under Large Scale Cyclic Loading

Masao Toyoda, Mitsuru Ohata, Masaki Yokota, Osamu Yasuda, Masahiko Hirono

Proc. 20th Int. Conf. on Offshore Mechanics and Arctic Engineering, 2001　2001/06

Effect of Strength Mismatch and Dynamic Loading on Criterion for Ductile Crack Initiation

Gyu-Baek An, Satoshi Yoshida, Zdravko Praunseis, Mitsuru Ohata, Masao Toyoda

Journal of the Japan Society of Naval Architects and Ocean Engineers　No. 189　p. 375-386　2001/05　Research paper (scientific journal)

Fracture Behavior of Welded Joints under Static and Dynamic Loading

Masao Toyoda, Zdravko Praunseis, Maribor University, Mitsuru Ohata

2000/12

Ductile Crack Growth Behavior of Structure Steels under Cyclic Loading -Brittle Fracture Evaluation of Steel Components Subjected to Large Scale Cyclic Loading (Part 1)-

Mitsuru Ohata, Fumiyoshi Minami, Syusuke Fujita, Masaaki Hashimoto, Masao Toyoda

Vol. 188　p. 679-689　2000/11　Research paper (scientific journal)

Characteristics of Welding Distortion and Its In-Process Control by Ahead Heating Method in Aluminum Alloy Welded Joint

Masahito Mochizuki, Mitsuru Ohata, Shinji Takeno, Masao Toyoda

Journal of Light Metal Welding and Construction (in Japanese), Vol. 38, No. 11, pp. 536-543　2000/11　Research paper (scientific journal)

Criterion for Ductile Crack Initiation of Structural Steel under a Large Scale Cyclic Loading

Osamu Yasuda, Takada Kiko Co, Masahiko Hirono, Takada Kiko Co, Masaki Yokota, Mitsuru Ohata, Masao Toyoda

Vol. 8　p. 425-432　2000/11　Research paper (scientific journal)

Ductile Fracture Initiation Behavior of Pipe under a Large Scale of Cyclic Loading

Masao Toyoda, Mitsuru Ohata, Naoshi Ayukawa, l, Co, Go Ohwaki, KK Corporation, Yoritaka Ueda, Kawasaki Steel Corporation, Izumi Takeuchi, Sumitomo Metal, Industries

Pipeline Technology, Vol.￣II (ed.￣Rudi Denys), Elsevier Science B.V., pp.￣87-102　Vol. 2　p. 87-102　2000/05　Research paper (scientific journal)

Effect of Welding Condition on Fracture Performance of Butt Welded Joint in Steel Flamed Structure

Go Nakao, Mitsuru Ohata, Masao Toyoda, Yoshihiro Fujita, Yoshiomi Maruoka

1999/12

Control of Mechanical Properties for the Improvement of Deformability of Structural Components

Mitsuru Ohata, Noriaki Tanaka, Mitsushi Ohmasa, Masao Toyoda

1999/11　Research paper (scientific journal)

Local Approach to Brittle Fracture Strength Evaluation of Large Component with Shallow V-Notch-Application of the Local Approach to Fracture Control Design(Part 5)-

MINAMI Fumiyoshi, OHATA Mitsuru, NAGAO Ryou

日本造船学会論文集　No. 186　p. 465-473　1999/11　Research paper (scientific journal)

Control of welding distortion in fillet welds of aluminium alloy thin plates

M. Ohata, Y. Toda, M. Toyoda, S. Takeno

Welding International　Vol. 13　No. 12　p. 967-976　1999　Research paper (scientific journal)

Control of welding distortion in fillet welds of aluminum alloy

Mitsuru Ohata, Yoshinori Toda, Masao Toyoda, Shinji Takeno

Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society　Vol. 17　No. 2　p. 301-309　1999　Research paper (scientific journal)

Study of Fracture Characteristics of Cetrifugal Casting Steel Pipe by Local Approach

Kouichi Harada, Mitsuru Ohata, Osamu Etou, Takao Mihara, Masao Toyoda

1998/11　Research paper (scientific journal)

Determination of Required Fracture Toughness of Materials Considering Transferability to Fracture Performance Evaluation for Structural Components - Application of the Local Approach to Fracture Control Design (Part 1) -

Fumiyoshi Minami, Mitsuru Ohata, Masao Toyoda, Kazushige Arimochi, Sumitomo Metal, I

Journal of the Japan Society of Naval Architects and Ocean Engineers　No. 182　p. 647-657　1997/12　Research paper (scientific journal)

Local Approach to Strength Mis-Matching on Cleavage Fracture of Notched Material

Mitsuru Ohata, Fumiyoshi Minami, Masao Toyoda

1997/10　Research paper (scientific journal)

Prediction of Specimen Geometry Effect on Fracture Resistance of HAZ-Notched Welds by The Local Approach

Fumiyoshi Minami, Mitsuru Ohata, Masao Toyoda, Kazushige Arimochi, Sumitomo Metal Ind, Shuich Suzuki, Sumitomo Metal Ind, Kiyoshi Bessyo, Sumikin Welding Ind, Christian Thaulow, SINTEF, Production Eng, Mons Hauge, SINTEF, Production Eng

1997/10　Research paper (scientific journal)

Fracture Toughness Requirement for Fracture Performance Evaluation of Welded Joints Based on the Local Approach

Fumiyoshi Minami, Mitsuru Ohata, Masao Toyoda, Teruyuki Tanaka, umitomo, Metal, Kazushige Arimochi, Sumitomo Metal Ind, Alan Glover, NOVA Corporation of Alberta, Tom North, sity of To

1997/10　Research paper (scientific journal)

Evaluation of HAZ Fracture Toughness of Welded Joints with Strength Mis-Matching by the Local Approach

Mitsuru Ohata, Fumiyoshi Minami, Masao Toyoda

Journal of the Japan Society of Naval Architects and Ocean Engineers　No. 180　p. 565-573　1996/12　Research paper (scientific journal)

Equivalent CTOD Concept Based on the Local Approach and Its Application to Fracture Performance Evaluation of Welded Joints

Mitsuru Ohata, Fumiyoshi Minami, Masao Toyoda, Teruyuki Tanaka, umitomo Metal, In, Kazushige Arimochi, Sumitomo Metal, Ind, Alan Glover, NOVA Corp. of Alberta, Tom North, sity of To

Journal of the Japan Society of Naval Architects and Ocean Engineers　No. 179　p. 379-387　1996/06　Research paper (scientific journal)

Evaluation of specimen geometry effect on brittle fracture resistance based on the local approach

Fumiyoshi Minami, Claudio Ruggieri, Mitsuru Ohata, Masao Toyoda

Zairyo/Journal of the Society of Materials Science, Japan　Vol. 45　No. 5　p. 544-551　1996　Research paper (scientific journal)

The Effect of Weld Metal Yield Strength on the Fracture Behavior of Girth Welds in Grade 550 Pipe

Fumiyoshi Minami, Mitsuru Ohata, Masao Toyoda, Teruyuki Tanaka, umitomo Metal, Ind, Kazushige Arimochi, Sumitomo Metal Ind, Alan G. Glover, NOVA Corporation of Alberta, nd Tom, H. North, sity of T

Proc. of 2nd International Conference on Pipeline Technology　Vol. 1　p. 441-461　1995/11　Research paper (scientific journal)

Yield Strength Mis-Matching Effect on Fracture Performance of Girth Welded Joints of Grade 550 Pipeline Steel

Fumiyoshi Minami, Mitsuru Ohata, Masao Toyoda, Teruyuki Tanaka, umitomo Metal, Ind, Kazushige Arimochi, Sumitomo Metal Ind, Alan G. Glover, NOVA Corporation of Alberta, nd Tom, H. North, sity of T

Proceedings of the 14th International Conference on Offshore Mechanics and Arctic Engineering,Pipeline Technology　1995/06