期刊
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
卷 419, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2023.116630
关键词
Ductile damage and fracture; Reverse loading; Non-proportional biaxial experiments; Numerical algorithm; Finite strains
This paper explores the numerical analysis of ductile damage and fracture behavior under non-proportional biaxial reverse loading conditions. A two-surface anisotropic cyclic elastic-plastic-damage continuum model is presented, taking into account various effects. An efficient Euler explicit numerical integration algorithm is used, and discussions are provided on achieving convergence within the global Newton-Raphson scheme.
This paper deals with the numerical analysis of ductile damage and fracture behavior under non -proportional biaxial reverse loading conditions. A two-surface anisotropic cyclic elastic-plastic-damage continuum model is adequately presented, which takes into account the Bauschinger effect, the stress-differential effect, and the change of hardening rate after reverse loading. An efficient Euler explicit numerical integration algorithm, based on the inelastic (plastic or plastic -damage) predictor-elastic corrector approach, is utilized to analyze the stress and finite strain loading histories. Detailed discussions are provided on different numerical integration-related consistent tangent operators that achieve convergence within the global Newton-Raphson scheme. The proposed continuum model is implemented into the commercial software Ansys as a user-defined subroutine (UMAT). Furthermore, the novel non-proportional biaxial tensile reverse experiments are performed to validate the proposed continuum model. The associated numerical simulations investigate the stability and accuracy of the proposed algorithm and material model.
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