Multiscale thermal and thermo-structural optimization of three-dimensional lattice structures
| Autor: | Chikwesiri Imediegwu, Ryan Murphy, Robert Hewson, Matthew Santer |
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| Rok vydání: | 2021 |
| Předmět: |
Technology
Homogenization Science & Technology Control and Optimization Additive manufacturing Heterogeneous multiscale methods Lattice Thermo-structural optimization Engineering Multidisciplinary Mechanics Design Practice & Management Computer Graphics and Computer-Aided Design 09 Engineering Free material optimization Computer Science Applications Engineering DESIGN METAMATERIALS Control and Systems Engineering Computer Science Computer Science Interdisciplinary Applications ASYMPTOTIC HOMOGENIZATION 01 Mathematical Sciences Software TOPOLOGY OPTIMIZATION |
| Zdroj: | Structural and Multidisciplinary Optimization. 65 |
| ISSN: | 1615-1488 1615-147X |
| DOI: | 10.1007/s00158-021-03087-8 |
| Popis: | This paper develops a robust framework for the multiscale design of three-dimensional lattices with macroscopically tailored thermal and thermo-structural characteristics. A multiscale approach is implemented where the discrete evaluations of small-scale lattice unit cell characteristics are converted to response surface models so that the properties exist as continuous functions of the lattice micro-parameters. The derived framework constitutes free material optimization in the space of manufacturable lattice micro-architecture. The optimization of individual lattice member dimensions is enabled by the adjoint method and the explicit expressions of the response surface material property sensitivities. The approach is demonstrated by solving thermal and thermo-structural optimization problems, significantly extending previous work which focused on linear structural response. The thermal optimization solution shows a design with improved optimality compared to the SIMP methodology. The thermo-structural optimization solution demonstrates the method’s capability for attaining a prescribed displacement in response to temperature gradients. |
| Databáze: | OpenAIRE |
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