Graded-density Lattice Structure Optimization Design Based on Topology Optimization

doi:10.3901/JME.2019.08.065

Abstract

Abstract: Lattice material is an ultra-light, high-strength, high-performance porous material. At present, the lattice structure is mainly constructed with uniform density. Different parts made of the lattice material are subjected to different loads, which results in a problem that the optimal performance of the lattice material with uniform density cannot be fully achieved. In view of the above problems, a multiscale topology optimization method based on homogenization method is proposed, which realizes the graded-density lattice structure, and the optimal graded-density lattice structure can be obtained according to the actual load to achieve optimal performance. Taking the automobile connecting rod as an example, comparing with the method of beam-model-based lattice optimization from the commercial software HyperWorks, the proposed method has better performance on mass reduction and the stress distribution. Therefore, the method obtains a better-property design, which is more suitable for the optimal design of graded-density lattice structures.

Key words: 3D printing, FEA, graded-density, lattice structure, topology optimization

CLC Number:

TH140

LIAO Zhongyuan, WANG Yingjun, WANG Shuting. Graded-density Lattice Structure Optimization Design Based on Topology Optimization[J]. Journal of Mechanical Engineering, 2019, 55(8): 65-72.

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