A unified potential-based cohesive model of mixed-mode fracture

被引：397

作者：

Park, Kyoungsoo ^{[1
]}

Paulino, Glaucio H. ^{[1
]}

Roesler, Jeffery R. ^{[1
]}

机构：

[1] Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA

来源：

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS | 2009年 / 57卷 / 06期

基金：

美国国家科学基金会;

关键词：

Fracture; Constitutive behavior; Energy release rate; Fracture mechanism; Cohesive fracture; CRACK-GROWTH; BOND MODEL; ZONE; NUCLEATION; SIMULATION; RESISTANCE; DEFECTS; LAW;

D O I：

10.1016/j.jmps.2008.10.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A generalized potential-based constitutive model for mixed-mode cohesive fracture is presented in conjunction with physical parameters such as fracture energy, cohesive strength and shape of cohesive interactions. It characterizes different fracture energies in each fracture mode, and can be applied to various material failure behavior (e.g. quasi-brittle). The unified potential leads to both intrinsic (with initial slope indicators to control elastic behavior) and extrinsic cohesive zone models. Path dependence of work-of-separation is investigated with respect to proportional and non-proportional paths-this investigation demonstrates consistency of the cohesive constitutive model. The potential-based model is verified by simulating a mixed-mode bending test. The actual potential is named PPR (Park-Paulino-Roesler), after the first initials of the authors' last names. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：891 / 908

页数：18

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