Numerical analysis of the influence of the Lode parameter on void growth

• Published in: International journal of solids and structures Vol. 38; no. 32; pp. 5847 - 5856
• Main Authors: Zhang, K.S, Bai, J.B, François, D
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.08.2001; Elsevier Science
• Subjects: Computational techniques; Critical strain for unstable void expansion; Cross-disciplinary physics: materials science; rheology; Cubic cell; Deformation, plasticity, and creep; Exact sciences and technology; Finite-element and galerkin methods; Lode parameter; Materials science; Mathematical methods in physics; Physics; Treatment of materials and its effects on microstructure and properties; Triaxiality; Void directional expansion; Triaxiality; Void directional expansion; Cubic cell; Critical strain for unstable void expansion; Lode parameter; High strain; Mechanical model; Boundary conditions; Numerical method; Cavitation; Triaxial stress; Periodic structure; Spherical cavity; Finite element method; Three dimensional model; Numerical analysis; Modelling; Microstructure; Cell
• ISSN: 0020-7683; 1879-2146
• DOI: 10.1016/S0020-7683(00)00391-7

In the present paper, three-dimensional numerical analyses of a spherical void, contained within a cubic cell, under finite deformation have been carried out. The calculations took the different stress triaxialities, including the common triaxiality parameter and the Lode parameter, into account. The analyses were focused on the influence of different Lode parameter values on the directional expansion of a void. According to the analyses, it can be concluded that: (1) the void has a different rate of expansion in different directions depending on the variation of the Lode parameter; (2) variation of the Lode parameter changes the critical strain of the void unstable expansion (or void linking) contained within the cubic cell.