Multi-Material Topology Optimization of Thermo-Elastic Structures with Stress Constraint

This paper proposes a multi-material topology optimization formulation for thermo-elastic structures considering coupled mechanical and uniform thermal loads. The ordered-SIMP multiple materials interpolation model is introduced, combined with examples considering structural volume minimization unde...

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Bibliographic Details
Published in:Mathematics (Basel) 2022-04, Vol.10 (8), p.1216
Main Authors: Chen, Jianliang, Zhao, Qinghai, Zhang, Liang
Format: Article
Language:English
Subjects:
Asymptotes
Compliance
Heat
Interpolation
Load
Mathematics
multi-material design
Optimization
Sensitivity
Stress concentration
stress constraint
Thermal analysis
thermo-elastic structure
Topology optimization
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Summary:This paper proposes a multi-material topology optimization formulation for thermo-elastic structures considering coupled mechanical and uniform thermal loads. The ordered-SIMP multiple materials interpolation model is introduced, combined with examples considering structural volume minimization under stress constraints. The p-norm function with the adjusted coefficient was adopted to measure the global maximum stress. The adjoint variable method is presented to discuss the sensitivity of stress constraints, and the method of moving asymptotes (MMA) is utilized to update the design variables. The results demonstrate that clear topologies are obtained for complicated multiple material combinations with various temperature values. Meanwhile, the optimized configuration with stress constraints has clear sensitivity to uniform temperature variations. Therefore, the proposed model demonstrates the necessity of a thermo-elastic model influenced by temperature in optimization.
ISSN:2227-7390
2227-7390
DOI:10.3390/math10081216