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• W4286484345 endingPage "115358" @default.
• W4286484345 startingPage "115358" @default.
• W4286484345 abstract "A probabilistic approach to phase-field brittle and ductile fracture with random material and geometric properties is proposed within this work. In the macroscopic failure mechanics, materials properties and spatial quantities (of different phases in the geometrical domain) are assumed to be homogeneous and deterministic. This is unlike the lower scale with strong fluctuation in the material and geometrical properties. Such a response is approximated through some uncertainty in the model problem. The presented contribution is devoted to providing a mathematical framework for modeling uncertainty through stochastic analysis of a microstructure undergoing brittle/ductile failure. Hereby, the proposed model employs various representative volume elements with random distribution of stiff inclusions and voids within the composite structure. We develop an allocating strategy to allocate the heterogeneities and generate the corresponding meshes in two- and three-dimensional cases. Then the Monte Carlo Finite Element Method (MC-FEM) is employed for solving the stochastic PDE-based model and approximate the expectation and the variance of the solution field of brittle/ductile failure by evaluating a large number of samples. For the prediction of failure mechanisms, we rely on the phase-field approach which is a widely adopted framework for modeling and computing the fracture phenomena in solids. Incremental perturbed minimization principles for a class of gradient-type dissipative materials are used to derive the perturbed governing equations. This analysis enables us to study the highly heterogeneous microstructure and monitor the uncertainty in failure mechanics. Several numerical examples are given to examine the efficiency of the proposed method." @default.
• W4286484345 created "2022-07-22" @default.
• W4286484345 creator A5013488904 @default.
• W4286484345 creator A5020508945 @default.
• W4286484345 creator A5055129735 @default.
• W4286484345 date "2022-09-01" @default.
• W4286484345 modified "2023-09-26" @default.
• W4286484345 title "Probabilistic failure mechanisms via Monte Carlo simulations of complex microstructures" @default.
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• W4286484345 doi "https://doi.org/10.1016/j.cma.2022.115358" @default.
• W4286484345 hasPublicationYear "2022" @default.
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