Abstract

An assessment method for characteristics of low-rate development of fatigue cracks under operational loading is proposed. The method is based on the decrease in the irregular loading level by conservation of its conformity during crack growth. The control factor of the loading decrease is the intrinsic increase in the compliance of a sample during crack growth by its fixed opening. The experimental dependences of the crack growth rate on the number of operation load blocks with a decrease in the loading level are obtained.

中文翻译：

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低水平运行载荷下钢的疲劳裂纹发展特征

摘要

提出了一种在运行载荷下疲劳裂纹低速发展特征的评估方法。该方法基于在裂纹扩展过程中通过保持其一致性来减少不规则载荷水平。载荷降低的控制因素是在裂纹扩展过程中，由于其固定开口而导致的顺应性的固有增加。随着载荷水平的降低，获得了裂纹扩展速率对操作载荷块数量的实验依赖性。