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Influence of finite deformations on the growth mechanism of microvoids contained in structural metals
Arch. Mech. 51 (1), 71-86, 1999
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Abstract
In this paper an analysis of the growth mechanism of the single microvoid for finite deformations is presented. A hollow sphere model is assumed. Such a model has been considered in many previous papers, however on the assumption that the strains remain small. The material surrounding the microvoid is assumed to be work-hardening, viscoplastic, described by the constitutive equations formulated by Perzyna [1]. Quantitative and qualitative distinctions between the presented solution and geometrically linear solution are discussed. On the basis of the obtained solution, constitutive functions of a certain damage evolution equation for the complex stress state have been identified. A numerical example of the fracture analysis for a structural element is presented.