In plane impact performance of honeycomb structure with sinusoidal curved edge and negative Poisson&rsquo;s ratio

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (13) : 51-59.

In plane impact performance of honeycomb structure with sinusoidal curved edge and negative Poisson’s ratio

YU Kejiong1, 2, XU Fengxiang1, 2, HUA Lin1, 2

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Abstract

Here, a negative Poisson’s ratio honeycomb structure with sinusoidal function curve was proposed. By changing amplitude, cell wall thickness and other microstructure geometric parameters, a parametric sinusoidal negative Poisson’s ratio honeycomb structure model was established. Effects of impact velocity and microstructure geometric parameters on in-plane impact deformation mode, dynamic response and energy absorption characteristics of the sinusoidal honeycomb structure were studied. The study results showed that in-plane impact performance of honeycomb structure with sinusoidal negative Poisson’s ratio is mainly related to its amplitude, wall thickness and impact velocity; during impacting with medium-low speed, the larger the amplitude, the thicker the cell wall, the more uniform the deformation in structural plane; with increase in impact velocity, increasing amplitude and wall thickness can increase platform stress at impact end to a certain extent; the sinusoidal negative Poisson honeycomb structure with smaller amplitude has stronger energy absorption capacity, it can significantly reduce peak impact force compared with concave hexagonal honeycomb structure.

Key words

negative Poisson’s ratio (NPR) / sinusoidal curve / in-plane impact / microstructure parameter / energy absorption

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YU Kejiong1, 2, XU Fengxiang1, 2, HUA Lin1, 2. In plane impact performance of honeycomb structure with sinusoidal curved edge and negative Poisson’s ratio[J]. Journal of Vibration and Shock, 2021, 40(13): 51-59

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