Quantifying 3D crack propagation in nodular graphite cast iron using advanced digital volume correlation and X-ray computed tomography

被引：5
|
作者：
Liu, Haizhou [1 ]
Hild, Francois [1 ]
机构：
[1] Univ Paris Saclay, Ctr Supelec, ENS Paris Saclay, CNRS,LMPS, Gif Sur Yvette, France
来源：
ENGINEERING FRACTURE MECHANICS | 2024年 / 296卷
关键词：
Digital volume correlation; 3D crack propagation; 3D crack shape; Stress intensity factor; Nodular graphite cast iron; STRESS INTENSITY FACTOR; WEDGE SPLITTING TEST; IMAGE CORRELATION; IDENTIFICATION METHODS; DISPLACEMENT-FIELDS; FATIGUE CRACKS; PARAMETERS; CLOSURE; CHOICE;
D O I：
10.1016/j.engfracmech.2023.109824
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Advanced digital volume correlation (DVC) combined with X-ray computed tomography (XCT) was utilized to investigate the 3D crack propagation in nodular graphite cast iron under tensile loading. The objective of this work was to quantify crack growth at the voxel-scale and extract fracture mechanics parameters such as the 3D crack front, crack opening displacements (CODs), and stress intensity factors (SIFs). By employing a crack growth updating strategy and an adaptive multiscale mesh, the 3D crack shape and propagation were accurately captured throughout the entire process. Von Mises strain and COD fields were characterized to provide insights into plastic zones and variations in crack opening behavior. Estimation of SIFs revealed a mode I dominant regime and limited influence from modes II and III. This study provides comprehensive insights into crack propagation and crack opening behavior, providing valuable information to fracture mechanics.
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收藏
页数：19
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