1.Hubei Provincial Key Lab of Advanced Technology of Automotive Components, Wuhan University of Technology, Wuhan 430070, China;
2.Hubei Provincial Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan 430070, China
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.
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