Parametric design and impact performance research of variable density honeycomb structure based on topology optimization

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (22) : 29-39.

ZOU Zhen1,2，XU Fengxiang1,2，XU Zhizhao1,2，JIANG Zhoushun1,2

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Abstract

In order to solve the problem that the improvement effect of gradient design on honeycomb impact performance cannot be maximized due to the design of empirical gradient distribution and discontinuous variable gradient for existing gradient honeycomb. In this paper, a parametric design with topology-optimized density mapping honeycomb structure is proposed based on the variable density topology optimization method. The corresponding topologically optimized density-mapped honeycomb structure model is established by changing the parameters of relative density and mapping coefficient. The effects of gradient coefficient and relative density on its in-plane impact deformation mode, mechanical response and energy absorption characteristics are studied under different impact velocities. The results show that the mapping coefficients, relative densities and impact velocities have significant effects on the in-plane deformation modes of the topologically optimized density mapped honeycomb, and the increase of the mapping coefficient is beneficial to improve its platform stress and specific absorption energy. The comparison results with the impact performance of standard homogeneous honeycomb of the same mass and size show that the PCF of the topologically optimized density mapped honeycomb is reduced by 16.9%, while the SEA is increased by 29.1%, respectively. It is shown that introducing the topology-optimized continuous variable density method into the design of gradient honeycomb can effectively improve the impact performance of honeycomb structure.

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honeycomb structure / topology optimization / in-plane impact / heterogeneous / energy absorption

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ZOU Zhen1,2，XU Fengxiang1,2，XU Zhizhao1,2，JIANG Zhoushun1,2. Parametric design and impact performance research of variable density honeycomb structure based on topology optimization[J]. Journal of Vibration and Shock, 2023, 42(22): 29-39

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