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- W4310410504 abstract "This paper presents computationally feasible rank-one relaxation algorithms for the efficient simulation of a time-incremental damage model with nonconvex incremental stress potentials in multiple spatial dimensions. While the standard model suffers from numerical issues due to the lack of convexity, the relaxation by rank-one convexification prevents non-existence of minimizers and mesh dependence of the solutions of finite element discretizations. By the combination, modification and parallelization of the underlying convexification algorithms, the novel approach becomes computationally feasible. A descent method and a Newton scheme enhanced by step-size control prevent stability issues related to local minima in the energy landscape and the computation of derivatives. Numerical techniques for the construction of continuous derivatives of the approximated rank-one convex envelope are discussed. A series of numerical experiments demonstrates the ability of the computationally relaxed model to capture softening effects and the mesh independence of the computed approximations. An interpretation in terms of microstructural damage evolution is given, based on the rank-one lamination process." @default.
- W4310410504 created "2022-12-10" @default.
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- W4310410504 date "2022-11-24" @default.
- W4310410504 modified "2023-09-23" @default.
- W4310410504 title "Multidimensional rank-one convexification of incremental damage models at finite strains" @default.
- W4310410504 doi "https://doi.org/10.48550/arxiv.2211.14318" @default.
- W4310410504 hasPublicationYear "2022" @default.
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