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• W4244580239 abstract "Abstract This paper presents a computationally tractable approach for designing lattice structures for stiffness and strength. Yielding in the mesostructure is determined by a worst-case stress analysis of the homogenization simulation data. This provides a physically meaningful, generalizable, and conservative way to estimate structural failure in three-dimensional functionally graded lattice structures composed of any unit cell architectures. Computational efficiency of the design framework is ensured by developing surrogate models for the unit cell stiffness and strength as a function of density. The surrogate models are then used in the coarse-scale analysis and synthesis. The proposed methodology further uses a compact representation of the material distribution via B-splines, which reduces the size of the design parameter space while ensuring a smooth density variation that is desirable for manufacturing. The proposed method is demonstrated in compliance with minimization studies using two types of unit cells with distinct mechanical properties. The effects of B-spline mesh refinement and the presence of a stress constraint on the optimization results are also investigated." @default.
• W4244580239 created "2022-05-12" @default.
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• W4244580239 date "2020-03-30" @default.
• W4244580239 modified "2023-10-17" @default.
• W4244580239 title "Stress-Constrained Design of Functionally Graded Lattice Structures With Spline-Based Dimensionality Reduction" @default.
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• W4244580239 doi "https://doi.org/10.1115/1.4046237" @default.
• W4244580239 hasPublicationYear "2020" @default.
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