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• W3005646107 endingPage "112887" @default.
• W3005646107 startingPage "112887" @default.
• W3005646107 abstract "Abstract For multi-material structures, ensuring material interface strength is particularly vital for their integrity and durability. In the present study, we incorporate material interfacial stress constraints into topology optimization of bi-material structures. A multi-material level set method, in conjunction with interface-conforming finite element meshes, is employed to describe the distribution of different material phases and to capture the evolution of the material interfaces. The use of interface-conforming meshes enables accurate analysis of both interfacial stresses and their design sensitivities. Noting that the interfacial strength failure is usually characterized by a tension/compression asymmetric mechanism, we adopt an equivalent interfacial stress (which was originally proposed for strength criterion concerning composite delamination) expressed by the interface tensile and tangential stresses in the considered strength criterion. To handle the local nature of such interfacial stress constraints, we propose a global stress measure, which is an approximation of the p-norm of the equivalent interfacial stress field. An adjoint sensitivity analysis scheme is derived by taking into account the interface transmission conditions. To treat multiple constraints (the volume constraints and the interfacial stress constraint) in level set-based topology optimization, the velocity field-level set method is employed. Numerical examples are presented to show effectiveness of the present method. It is also shown that the tension/compression asymmetric interfacial strength criteria may lead to asymmetric designs." @default.
• W3005646107 created "2020-02-24" @default.
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• W3005646107 date "2020-05-01" @default.
• W3005646107 modified "2023-10-16" @default.
• W3005646107 title "Multi-material structural topology optimization considering material interfacial stress constraints" @default.
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• W3005646107 doi "https://doi.org/10.1016/j.cma.2020.112887" @default.
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