Experimental determination of the reversed plastic zone size around fatigue crack using digital image correlation

被引：21
|
作者：
Gonzales, Giancarlo L. Gomez [1 ]
Gonzalez, Julian A. Ortiz [2 ]
Antunes, Fernando V. [3 ]
Neto, Diogo M. [3 ]
Diaz, Francisco A. [1 ]
机构：
[1] Univ Jaen, Dept Ingn Mecan & Min, Jaen, Spain
[2] Univ Autonoma Manizales, Dept Ingn Mecan, Caldas, Colombia
[3] Univ Coimbra, Ctr Mech Engn Mat & Proc CEMMPRE, Dept Mech Engn, Coimbra, Portugal
来源：
THEORETICAL AND APPLIED FRACTURE MECHANICS | 2023年 / 125卷
关键词：
Fatigue crack growth; Reversed plastic zone; Crack tip fields; Cyclic plastic deformation; Plasticity -induced crack closure; STRESS RATIO; PROPAGATION; TIP; CLOSURE; GROWTH; PARAMETER;
D O I：
10.1016/j.tafmec.2023.103901
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This paper provides an experimental methodology to determine the reversed plastic zone size at the crack tip under cyclic loading through high-resolution DIC measurements. Due to the small size of this region, a 3D-DIC system based on two cameras in a stereoscopic setup with an optical microscope was used in the experimental setup. Fatigue crack growth tests were performed on AISI 1020 steel specimens to evaluate crack tip plasticity. The experimental results obtained with the proposed methodology demonstrate that the reversed plastic zone is a potential parameter to describe the fatigue crack propagation process and related phenomena.
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页数：8
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