Abstract
In this paper, the elastic-plastic FEM method with a kinematic hardening model has been used to analyse a three-point-bend specimen. The relation between the maximum strain and the crack opening displacement has been investigated. Based on the Rice-Tracey void growth model, the V G value has been calculated with the numerical integration method. For ductile materials, the cause of void formation and the condition of the void coalescence with the main crack have been discussed and, the results agree well with those of Li Changchun et al. [ J. Huazhong Univ. Sci. Technol. 17, 139–144 (1989)] and our experiments in this paper.
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