切欠きを有する溶接継手部の片振圧縮疲労強度

概要

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The fatigue crack initiation life prediction of butt welded joints with notch under pulsating compression (R=-∞) by bending load has been inverstigated by paying attention to the local atrain at the notch root. The experimental results indicate that the fatigue crack initiation and propagation take place at the notch root in spite of pulsating compression, and there is a tendency that the propagation rate decreases with increasing cycles. These cracks emanating from the notch root under pulsating compression become nonpropagation cracks. From an engineering point of view, the fatigue crack initiation life at the notch root can be estimated by a local strain approach using the fatigue crack initiation data of smooth specimens. Itbecomes clear that in consideration of the compressive plastic-induced opening the fatigue crack growth behavior at the notch root under pulsating compression can be well explained by the effective stress intensity factor.
社団法人日本材料学会の論文
1985-10-15