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首页> 外文期刊>Engineering Fracture Mechanics >Dependence of fatigue limit on step height for stepped 0.45% carbon steel with singular stress field
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Dependence of fatigue limit on step height for stepped 0.45% carbon steel with singular stress field

机译：疲劳极限对奇异应力场阶梯式0.45％碳钢步进高度的依赖性

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摘要

A method was proposed for evaluating the relationship between the fatigue limit and the step height for a stepped plate with a sharp corner. With reference to a small crack size dependence of fatigue limit, step heights were divided into three levels, and a new evaluation method was proposed for representing the singular stress field intensity around the corner tip. An intensity factor of the singular stress field of the corner was introduced and correlated with the step height. The fatigue limit for stepped plates was represented by the threshold value of the range of the intensity factor. Moreover, the fatigue limits for extra-low stepped plates and high stepped plates, which could not be directly measured, were estimated based on the fatigue phenomena at these conditions. (C) 2017 Elsevier Ltd. All rights reserved.
机译：提出了一种用于评估疲劳极限与阶梯高度与尖角的阶梯高度之间的关系。 参考疲劳极限的小裂缝尺寸依赖性，将步进高度分成三个水平，提出了一种新的评估方法，用于表示拐角尖端周围的奇异应力场强度。 引入拐角的奇异应力场的强度因子与台阶高度相关。 阶梯板的疲劳极限由强度因子的范围的阈值表示。 此外，基于这些条件下的疲劳现象估计了不直接测量的低阶梯式板和高阶梯式板的疲劳限制。 （c）2017 Elsevier Ltd.保留所有权利。

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