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.

引用

页数：19

共 86 条

[1]

[Anonymous], 2014, ASTM E647-13.

[2]

[Anonymous], 1967, FATIGUE CRACK PROPAG

[3] Fatigue crack growth versus plastic CTOD in the 304L stainless steel [J].