Effects of inclusion size and stress ratio on fatigue strength for high-strength steels with fish-eye mode failure
Effects of inclusion size and stress ratio on fatigue strength for high-strength steels with fish-eye mode failure
复制标题
夹杂物尺寸和应力比对鱼眼模式失效高强度钢疲劳强度的影响
DOI：
10.1016/j.ijfatigue.2012.12.004
复制
发表时间：
2013-03-01
影响因子：
6
通讯作者：
Hong, Youshi
中科院分区：
文献类型：
--
作者：
Sun, Chengqi;Lei, Zhengqiang;Hong, Youshi
实验结果表明，夹杂物尺寸增大一倍，疲劳寿命降低两个数量级左右。在此基础上，提出了一种基于夹杂物尺寸和应力比影响的鱼眼疲劳强度预测模型。在该模型中，夹杂物尺寸a（o）和应力比R对疲劳强度σ（a）的影响表示为σ（a）与a（o）（m）[（1 - R）/2]（alpha）成比例，其中m和a是材料参数。预测结果与实验结果和文献报道的结果符合得很好。(C)2012爱思唯尔有限公司保留所有权利。
Experimental results indicate that the fatigue life reduces by about two orders of magnitude when inclusion size doubles. Then, a model is proposed for predicting the fatigue strength of high-strength steels with fish-eye mode failure based on the experimental results for the effect of inclusion size and stress ratio. In the model, the effect of inclusion size a(o) and stress ratio R on fatigue strength sigma(a) is expressed as sigma(a) proportional to a(o)(m)[(1 - R)/2](alpha), where m and a are material parameters. The predicted results are in good agreement with our experimental results and the ones reported in literature. (C) 2012 Elsevier Ltd. All rights reserved.