Topology Optimization of Multi-material Compliant Mechanisms Using Node-density Interpolation Scheme

doi:10.3901/JME.2021.15.053

Abstract

Abstract: Based on the spring model and node density interpolation SIMP (Solid Isotropic Material with Penalization) method, a layered optimization strategy for topology optimization of multi-material compliant mechanism is given. Firstly, with the objective of maximizing the displacement at the output port and constraining the corresponding volume fractions of the each considered material, a model for the topology optimization of multi-material compliant mechanism is established. Secondly, the C⁰ continuity of the density field in the design area is constructed by using node density interpolation. The analytical expressions of sensitivities of the objective function and constraints are given. A sensitivity filtering scheme with adaptive filtering radius is employed to eliminate the stratification phenomenon in the node density interpolation method. Then, a laid optimization strategy is given to solve the topology optimization problem of a multi-material compliant mechanism. Finally, the typical two-dimensional and three-dimensional compliant mechanisms topology optimization problems are used to verify the effectiveness of the proposed method, and the influence of design parameters on the optimization results was analyzed.

Key words: compliant mechanisms, multi-material, topology optimization, node density interpolation, density method

CLC Number:

TB112
TB114

ZHU Benliang, ZHANG Xianmin, LI Hai, WANG Rixin, LIU Min, LI Hao. Topology Optimization of Multi-material Compliant Mechanisms Using Node-density Interpolation Scheme[J]. Journal of Mechanical Engineering, 2021, 57(15): 53-61.

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