材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
停留き裂先端の応力拡大係数に及ぼす余盛止端部形状の影響
寺崎 俊夫秋山 哲也田中 洋征
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1988 年 37 巻 417 号 p. 663-669

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This paper deals with the effect of reinforcement shape factor on the stress intensity factor (KI) at the tip of a nonpropagating crack at the toe by using a Boundary element method. As micro-cracks exist in the welded joint, the fatigue strength of welded joint is determined by the propagating condition of nonpropagating cracks.
The following conclusions were derived from the numerical results of KI and the investigation of the shape of reinforcement made by shielded metal arc welding and CO2 gas welding; (1) The micro-crack does not affect KI; (2) The toe radius considerably influences KI; (3) The reinforcement angle affects KI; (4) The height and width of reinforcement do not affect KI.

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