Journal
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
Volume 344, Issue -, Pages 512-537Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2018.10.020
Keywords
Topology optimization; Stress constraints; Manufacturing uncertainties; Robust design
Funding
- CNPq (National Council for Research and Development), Brazil [306373/2016-5]
- FAPESP (Sao Paulo Research Foundation), Brazil [2015/25199-0]
- Villum Investigator Project InnoTop - Villum Foundation, Denmark
- Coordination for the Improvement of Higher Education Personnel - Brazil (CAPES) [001]
Ask authors/readers for more resources
This paper proposes a robust design approach, based on eroded, intermediate and dilated projections, to handle uniform manufacturing uncertainties in stress-constrained topology optimization. In addition, a simple scheme is proposed to increase accuracy of stress evaluation at jagged edges, based on limiting sharpness of the projections to intentionally allow a thin layer of intermediate material between solid and void phases. A reference problem is analyzed through voxel-based finite element models, demonstrating that, in association with a proper choice of stiffness and stress interpolation functions, the proposed scheme can ensure consistent stress magnitude and smooth stress behavior for uniform boundary variation. Optimization problems are solved and post-processing with body-fitted meshes is performed over optimized solutions, demonstrating that: (1) stresses evaluated with voxel-based meshes containing thin soft transition boundaries are consistent with stresses evaluated with body-fitted meshes; and (2) optimized structures are robust with respect to uniform boundary variations. (C) 2018 Elsevier B.Y. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available