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首页> 外文会议>Proceeding of An International Conference the Importance of understanding the fundamentals of the fatigue Process in Counteracting Its Effects in Engineering Components and Structures,and to Reflect on the Contributions of K.J.Miller Sheffield/United >Linearized crack growth laws for the characterization of long fatigue cracks
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Linearized crack growth laws for the characterization of long fatigue cracks

机译：线性化裂纹扩展定律，用于表征长疲劳裂纹

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摘要

Linearized fatigue crack growth laws are presented in this paper that will facilitate the prediction of fatigue lifetimes in structures involving all three (near-threshold,Paris and high DELTA K) regimes of long crack growth.The conditions required for the transitions from crack growth in the near-threshold to the mid- DELTA K regime and from the mid- DELTA K to the high- DELTA K regime are deter-mined mathematically by equating the different expressions at the transition points.The results obtained from this approach for two different metallic structural materials show the necessary correlations with the experimental fatigue crack growth data from which they were initially derived,thereby illustrating a mathematical system for characterizing fatigue resistant materials.
机译：本文提出了线性疲劳裂纹扩展定律，这将有助于预测涉及长裂纹扩展的所有三个（近阈值，巴黎和高DELTA K）态的结构的疲劳寿命。通过将过渡点处的不同表达式等式来数学确定DELTA K中段附近的阈值以及DELTA K中段到高DELTA K阈值的近似阈值。对于两种不同的金属结构材料与最初从中导出的实验疲劳裂纹扩展数据显示出必要的相关性，从而说明了表征抗疲劳材料的数学系统。

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