Susumu Satoh
Nagasaki Institute of Applied Science
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Welding in The World | 2010
Yasutake Chiba; Keiji Murayama; Susumu Satoh; Kyohsuke Miyashiro; Mitsuru Ohata; Fumiyoshi Minami
The effects of strength-mismatch between the base and weld metal in welded joints on CTOD and Charpy impact toughness of heat-affected zone (HAZ) are investigated in this study. Both toughness properties are compared, in consideration of the effect of the local brittle zone (LBZ) in HAZ, and strength-mismatch effects are discussed analytically. Two types of welded joints for 490 MPa strength class structural steel with the same thickness of 25 mm, which were strength-matched and overmatched joints, are prepared under the same welded conditions (heat input = 4 KJ/mm) with different welding consumables. The critical CTOD of the HAZ for the overmatched joint exhibits the lower values in wide temperature range of ductile-to-brittle fracture transition than that for the matched joint, whereas microstructures and total LBZ size along crack-tip are consistent with each other. On the contrary, significant difference between the matched and overmatched joints in the lower temperature range cannot be observed in the Charpy impact toughness. The reason why the strength-mismatch effects on the fracture toughness are different between the CTOD and Charpy impact tests is discussed.
ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering | 2002
Hiroshi Yajima; Yunbo Kho; Susumu Satoh; Kazuto Nishikawa; Motomichi Yamamoto
In the present report, an attempt was made to quantify the crack initiation strength for structural steel members having experienced large compressive prestrain due to buckling collapse. First, a tension test of the prestrained material was performed on JIS SS400 steel. The influence of prestraining on the mechanical properties of the material was investigated. Next, a crack initiation test and an elastoplastic large deformation FE-analysis for strip specimens were performed. The specimens were bent into various curvatures after undergoing buckling and the relationship between crack initiation and applied straining was examined. Finally, in order to investigate the crack initiation behavior for structural members subjected to cyclic bending load after undergoing buckling collapse, a crack initiation test and an elastoplastic large deformation FE-analysis for strip specimens under cyclic bending load were performed.Copyright
Proceedings of the 1996 15th International Conference on Offshore Mechanics and Arctic Engineering. Part 6 (of 6) | 1996
Susumu Satoh; Mitsuo Tsukamoto; Fumiyoshi Minami; Masao Toyoda
Proceedings of the 1998 17th International Conference on Offshore Mechanics and Arctic Engineering, OMAE | 1998
Susumu Satoh; Mitsuo Tsukamoto; Fumiyoshi Minami; Masao Toyoda
Transactions of the Japan Welding Society | 1984
Kunihiko Satoh; Masao Toyoda; Fumiyoshi Minami; Kazushige Arimochi; Mutsuo Nakanishi; Susumu Satoh
Transactions of the Japan Welding Society | 1983
Kunihiko Satoh; Masao Toyoda; Fumiyoshi Minami; Susumu Satoh; Mutsuo Nakanishi; Kazushige Arimochi
Quarterly Journal of The Japan Welding Society | 2007
Yasutake Chiba; Keiji Murayama; Susumu Satoh; Fumiyoshi Minami
Transactions of the Japan Welding Society | 1985
Kunihiko Satoh; Masao Toyoda; Fumiyoshi Minami; Mutsuo Nakanishi; Kazushige Arimochi; Susumu Satoh
Transactions of the Japan Welding Society | 1985
Kunihiko Satoh; Masao Toyoda; Susumu Satoh
Quarterly Journal of The Japan Welding Society | 1985
Kunihiko Satoh; Masao Toyoda; Susumu Satoh