Structural Topology Optimization of Bi-modulus Materials under Dynamic Loads

doi:10.3901/JME.260305

Abstract

Abstract: Many materials used in practical engineering exhibit different mechanical properties under tension and compression (i.e., Bi-modulus characteristics). However, there is limited research on topology optimization methods for structures made of such materials, especially those considering dynamic loads. Therefore, a topology optimization method for Bi-modulus material structures under dynamic loads is proposed. First, the hybrid stress element is used to discretize the design domain to obtain more accurate stress calculation results. Second, a criterion for determining the tensile/compressive state of elements based on the principal stress sign and tensile/compressive tolerance is established, and a four-phase material interpolation model is constructed to achieve the optimal design of Bi-modulus material structures. Next, a criterion for determining the tensile/compressive state of elements based on the tensile/compressive strain energy under multi-load conditions is developed, enabling material distribution optimization under multiple load cases. Finally, the effectiveness of the method is verified through typical numerical examples, and the influence of parameters such as the tensile/compressive elastic modulus ratio and excitation frequency on the optimized configuration is analyzed, providing theoretical support for the lightweight design of Bi-modulus material structures under dynamic loads.

Key words: topology optimization, hybrid stress element, bi-modulus material, dynamic load, composite materials

CLC Number:

TH122

CAI Jinhu, CAO Haohao, RONG Jianhua, ZHAO Lei, LIU Xin, YIN Lairong, LI Fangyi. Structural Topology Optimization of Bi-modulus Materials under Dynamic Loads[J]. Journal of Mechanical Engineering, 2026, 62(13): 294-308.

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URL: http://www.cjmenet.com.cn/EN/10.3901/JME.260305

http://www.cjmenet.com.cn/EN/Y2026/V62/I13/294

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