A generalized maximum energy release rate criterion for mixed mode fracture analysis of brittle and quasi-brittle materials

被引：72
|
作者：
Hou, Cheng [1 ]
Jin, Xiaochao [1 ]
Fan, Xueling [1 ]
Xu, Rong [2 ]
Wang, Zhiyong [3 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Aerosp Engn, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Shaanxi, Peoples R China
[2] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA
[3] Taiyuan Univ Technol, Coll Mech & Vehicle Engn, Inst Appl Mech, Taiyuan 030024, Shanxi, Peoples R China
来源：
THEORETICAL AND APPLIED FRACTURE MECHANICS | 2019年 / 100卷
基金：
中国国家自然科学基金;
关键词：
Maximum energy release rate criterion; Mixed mode fracture; T-stress; Fracture initiation angle; Fracture resistance; CONTINUUM DAMAGE MODEL; DENSITY CRITERION; CRACK-PROPAGATION; DUCTILE FRACTURE; T-STRESS; ROCK; TOUGHNESS; BEHAVIOR; PREDICT; ZONE;
D O I：
10.1016/j.tafmec.2018.12.015
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A modified mixed mode fracture criterion, called generalized maximum energy release rate criterion, is proposed to predict the fracture initiation angles and estimate the fracture resistances in brittle and quasi-brittle materials under mixed mode loading. With this generalized maximum energy release rate criterion, the energy release rate around the crack tip is calculated by considering the contributions from both singular stress terms and T-stress. Experimental data, extracted from prior literatures for central cracked Brazilian disk, cracked semi-circular bend and edge-crack triangular specimens, are used to validate the modified criterion and evaluate the accuracy of the prediction obtained from this modified criterion. Results show that the T-stress plays a remarkable role in the mixed mode I/II fracture analysis when the energy-based criterion is employed. In addition, it is shown that the modified criterion can well predict the mixed mode I/II fracture behaviors of brittle and quasi-brittle materials.
引用
收藏
页码：78 / 85
页数：8
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