Fatigue Crack Propagation Behavior in the Hardness Heterogeneous Field

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概要

• 論文の詳細を見る

• When the fatigue crack propagates in the weld metal or H.A.Z., the propagation rate does not always increase monotonously and the crack path does not become straight everywhere. In this report, in order to obtain the fundamental information about the fatigue crack propagation behavior in the hardness heterogeneous field due to the welding, model specimens which had an induction hardened region were prepared, and the fatigue crack propagation tests were conducted under rather high stress conditions. According to the results of the examinations, when the fatigue crack propagated near the hard region which lay perpendicular or inclined to the propagation direction, the propagation rate had a close connection with the cyclic crack tip opening displacement (ΔCTOD), and the propagation direction depended on the asymmetry of the plastic region shape around the crack tip. The cyclic elasto plastic analysis based on the F.E.M. model was employed and the results showed that ΔCTOD was related to the cyclic equivalent plastic strain range distribution in the vicinity of the fatigue crack tip.

• 社団法人溶接学会の論文
• 1983-04-01

著者

• Nishimura Arata

  Department Of Welding Engineering Faculty Of Engineering Osaka University

• MUKAI Yoshihiko

  Department of Welding Engineering, Faculty of Engineering, Osaka University

• Mukai Yoshihiko

  Department Of Welding Engineering Faculty Of Engineering Osaka University

• Mukai Yoshihiko

  Department Of Mechanical Engineering For Transportation Osaka Sangyo University

関連論文

• Fatigue Crack Propagation Behavior and Analytical Estimation on the Electron Beam Weld Bead
• Fatigue Crack Propagation Behavior in the Hardness Heterogeneous Field
• A Stress Parameter for Correspondence Between Notched and Unnotched Specimen Fatigue Data : Strength of Fatigue Macrocrack Initiation at a Notch Root in Plates and Round Bars(Fatigue 2)

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