New Plastic Crack-Tip Opening Displacement Tool Based on Digital Image Correlation for Estimating the Fatigue-Crack-Growth Law on 316L Stainless Steel

被引：2
|
作者：
Ajmal, Muhammad [1 ,2 ]
Lopez-Crespo, Cristina [1 ,3 ]
Cruces, Alejandro S. [1 ]
Lopez-Crespo, Pablo [1 ]
机构：
[1] Univ Malaga, Dept Civil & Mat Engn, C Doctor Ortiz Ramos,s-n, Malaga 29071, Spain
[2] Yanbu Ind Coll, Yanbu 46452, Saudi Arabia
[3] Jesus Marin Polytech Inst, C Politecn 1, Malaga 29007, Spain
来源：
MATERIALS | 2023年 / 16卷 / 13期
关键词：
crack-tip opening displacement; digital image correlation; fatigue crack propagation; STRESS INTENSITY FACTOR; DRIVING-FORCE; CLOSURE; CTOD; PROPAGATION; MODEL; LIFE; PREDICTION; PARAMETER; RATIO;
D O I：
10.3390/ma16134589
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This work presents a new approach for studying crack growth resulting from fatigue, which utilizes the plastic contribution of crack-tip opening displacement (CTODp). CTODp is used to predict austenitic stainless-steel crack propagation. Unlike linear elastic fracture mechanics analysis, the method presented here is also helpful for tasks other than small-scale yielding. The approach was based on correlating full-field displacement information with post-processing digital images. This work describes a detailed post-processing protocol that can be used to calculate CTODp. The results for steel compact-tension specimens were especially promising. Of note, there was a linear relationship between the propagation rate of fatigue cracks and the CTODp range.
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页数：19
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