Design and Experimental Study of Non-Vertical Struts Body and Face- Centered-Cubic Lattice Structure Based on Topology Optimization

doi:10.3901/JME.2024.23.270

Abstract

Abstract: The existing design methods for lattice structures rarely take the actual stress conditions of the lattice structure into account, which makes it difficult to achieve their optimal performance. A topology optimization (TO) based lattice structure design method is thus proposed to address this issue, and an optimization model suitable for different load conditions is established. A multiple load and constraints optimization formulation based on TO is obtained, based on which a lattice structure design method for various load conditions is then proposed. A new lattice structure named NVBFCC is constructed under compression load condition. The relative density theoretical model and equivalent mechanical model of NVBFCC are established, and the influence of the size of the lattice beam and rod on the volume fraction and structural strength of the lattice is studied. The quasi-static compression tests and finite element analysis of the lattice structure are completed. The results validate the accuracy of the models proposed, and the principle for determining the optimal size of beams and rods is given. The compressive strength and equivalent elastic modulus of NVBFCC are 136% and 100% higher than that of the FBCCZ, respectively, exhibiting a superior performance.

Key words: lattice structure, mechanical properties, topology optimization, additive manufacturing, lightweight design

CLC Number:

TB383

CHEN Jianchao, SUN Zhiguang, LIU Bowei, DING Mingchao, WANG Jiachun, GUO Baosu. Design and Experimental Study of Non-Vertical Struts Body and Face- Centered-Cubic Lattice Structure Based on Topology Optimization[J]. Journal of Mechanical Engineering, 2024, 60(23): 270-277.

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