A new approximate model for the R-ratio effect on fatigue crack growth rate

被引：39
|
作者：
Zhan, Weigang [1 ]
Lu, Nianli [1 ]
Zhang, Chuanzeng [2 ]
机构：
[1] Harbin Inst Technol, Sch Mechatron Engn, Harbin 150001, Peoples R China
[2] Univ Siegen, Dept Civil Engn, D-57068 Siegen, Germany
来源：
ENGINEERING FRACTURE MECHANICS | 2014年 / 119卷
关键词：
Cyclic fatigue loading; Loading amplitude ratio effect; Crack growth rate; Stress intensity factor range; STRESS RATIO; DRIVING-FORCE; CLOSURE; PREDICTION; PARAMETER; THRESHOLD; BEHAVIOR;
D O I：
10.1016/j.engfracmech.2014.02.010
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A new approximate model for predicting the crack growth rate is proposed, which can condense the stable crack propagation stage curves for non-zero stress ratios to that for R = 0 in a narrow band. By using the new approximate model, the obtained material constants corresponding to R = 0 can be further widely used for different loading amplitude ratios. Many available experimental data taken from literature are analyzed using the proposed model for prediction of the crack growth rate. The results indicate that the new approximate model is accurate and effective to consider the R-ratio effect on the crack growth rate. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：85 / 96
页数：12
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