Concurrent Topology Optimization of Lightweight Cellular Materials and Structures

Abstract:

In this paper, a two-stage optimization algorithm is proposed to simultaneously achieve the optimum structure and microstructure of lightweight cellular materials. Microstructure is assumed being uniform in macro-scale to meet manufacturing requirements. Furthermore, to reduce the computation cost, the design process is divided into two stages, which are concurrent design and material design. In the first stage, macro density and modulus matrix of cellular material are used both as design variables. Then, the optimum topology of macro-structure and modulus matrix of cellular materials will be obtained under this configuration. In the second stage, topology optimization technology is used to achieve a micro-structure of cellular material which is corresponded with the optimum modulus matrix in the earlier concurrent design stage. Moreover, the effectiveness of the present design methodology and optimization scheme is then demonstrated through numerical example.

• Periodical: Applied Mechanics and Materials (Volume 868)
• Pages: 291-296
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.868.291
• Online since: July 2017
• Authors: He Ting Qiao*, Shi Jie Wang, Xiao Ren Lv
• Keywords: Concurrent, Lightweight Cellular Materials, Topplogy Optimization

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