Two-scale topology optimization based on Moving Morphable Components (MMC)

Abstract eng:
This paper studies concurrent topology optimization with multi micro material design. Unlike traditional concurrent topology optimization presented by Liu et al. [1], where a uniform micro material is used, the macro structure in this research is composed of sub domains, each with a different micro material design. This gives more flexibility to industrial use and is more reasonable as materials in different domains may experience different stress states. In micro material design, in order to overcome the zig-zag boundaries and grey elements in SIMP interpolation scheme, the Moving Morphable Component (MMC) approach is used to get a clear and smooth topology in favour of manufacturing applications, like the 3-D printing techniques. A numerical example is given to show the validity of this method. Issues of manufacturability related to 3-D printing techniques are discussed.

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