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  • 标题:表面き裂の疲労による伝播成長過程に関する予備的考察
  • 本地全文:下载
  • 作者:川原 正言 ; 栗原 正好
  • 期刊名称:日本造船学会論文集
  • 印刷版ISSN:0514-8499
  • 电子版ISSN:1884-2070
  • 出版年度:1975
  • 卷号:1975
  • 期号:137
  • 页码:297-306
  • DOI:10.2534/jjasnaoe1968.1975.297
  • 出版社:The Japan Society of Naval Architects and Ocean Engineers
  • 摘要:

    Fatigue tests have been carried out under combined tensile and bending loading on plate specimens containing a surface flaw. The characteristics of fatigue crack growth are studied by a crack-morphological approach. Surface crack growth exhibits two different modes ; “equilibrated growth” and “non-equilibrated growth”. Experimental results are well characterized by the following formulas, a / ( b n - b 0 n ) 1/ n = (0.98+0.07 R B ) - (0.06 + 0.94 R B ) · a / h db / dN =C [(Δσ T +Δσ B /2) · (π b ) 1/2] m The direct application of Paris formula using numerical solutions of stress intensity factor in semi-elliptical surface crack has not much advantage in precision nor in simplification of analysis.

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