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The present paper introduces a hybrid explicit-implicit topology optimizationmethod for shell-infill composite structure design. The proposed approacheffectively combines the advantages of the explicit Moving Morphable Component(MMC) method, which describes structural topology only using a set of geometricparameters, and the implicit Solid Isotropic Material with Penalization (SIMP)method, which offers greater design freedom for characterizing the structuralfeatures. Compared to the existing methods for shell-infill structure design,the proposed approach can obtain optimized shell-infill structures with complexinfill topology without resorting to complex filtering/projection operations.Numerical examples demonstrate the effectiveness of the proposed approach.

Shell-infill composite structure design based on a hybrid explicit-implicit topology optimization method