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- W4307207777 abstract "Much work has been done in multiscale topology optimization for maximum stiffness or minimum compliance design. Such approaches date back to the original homogenization-based work by Bends{o}e and Kikuchi from 1988, which lately has been revived due to advances in manufacturing methods like additive manufacturing. Orthotropic microstructures locally oriented in principal stress directions provide for highly efficient stiffness optimal designs, whereas for the pure stiffness objective, porous isotropic microstructures are sub-optimal and hence not useful. It has, however, been postulated and exemplified that isotropic microstructures (infill) may enhance structural buckling stability but this has yet to be directly proven and optimized. In this work, we optimize buckling stability of multiscale structures with isotropic porous infill. To do this, we establish local density dependent Willam-Warnke yield surfaces based on buckling estimates from Bloch-Floquet-based cell analysis to predict local instability of the homogenized materials. These local buckling-based stress constraints are combined with a global buckling criterion to obtain topology optimized designs that take both local and global buckling stability into account. De-homogenized structures with small and large cell sizes confirm validity of the approach and demonstrate huge structural gains as well as time savings compared to standard singlescale approaches." @default.
- W4307207777 created "2022-10-30" @default.
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- W4307207777 date "2022-10-18" @default.
- W4307207777 modified "2023-09-26" @default.
- W4307207777 title "Multiscale Topology Optimization Considering Local and Global Buckling Response" @default.
- W4307207777 doi "https://doi.org/10.48550/arxiv.2210.11477" @default.
- W4307207777 hasPublicationYear "2022" @default.
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