Three-dimensional modeling of fracture in quasi-brittle materials using plasticity and cohesive finite elements

被引：0
作者：
Raul Durand
Fernando Hipólito Barros Trinidade da Silva
机构：
[1] University of Brasilia,Department of Civil and Environmental Engineering
来源：
International Journal of Fracture | 2021年 / 228卷
关键词：
Finite elements; Quasi-brittle materials; Concrete cracking; Cohesive elements; Plasticity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
This paper presents a three-dimensional discrete approach based on the use of interface cohesive elements with zero thickness to model the crack formation and propagation in quasi-brittle materials. The interface constitutive model incorporates concepts of nonlinear fracture mechanics and plasticity. A Coulomb-based surface is used as yield function, and an exponential traction–separation curve as softening law. The model features a non-associated flow rule with an implicit integration scheme and is able to simulate the propagation of single and multiple cracks in mode I and mixed-mode. The proposed model was tested through extension and shear paths and applied in the simulation of experimental tests in concrete specimens available in the literature. Also, a study on the effect of the use of different bulk elements was performed. Numerical results, including peak loads and load-CMOD curves showing softening behavior, are in good agreement with the experimental data.
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页码：45 / 70
页数：25
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