In-plane impact response of coupled honeycomb structure with embedded negative Poisson's ratio
To improve the in-plane mechanical properties of honeycomb structure,the structure with concave negative Poisson's ratio was introduced and embedded into the traditional hexagonal honeycomb in-plane hole to form a new type coupled honeycomb structure with em-bedded negative poisson's ratio.The impact response characteristics and energy absorption capacity of the coupled honeycomb structure in-plane with embedded negative Poisson's ratio with different impact velocities were studied through the explicit dynamic finite element method.The results show that the deformation mode of coupled honeycomb structure is affected by impact velocity and coupling angle,and the nominal stress-nominal strain curves at impact end and supporting end of coupled honeycomb structure are related to its deformation mode and coupling angle,and the larger the coupling angle is,the lower the nominal stress level is.The plateau stress and specific energy absorption of the coupled honeycomb structure decrease with the increase of the coupling angle,the plateau stress is reduce by 2%-9%and specific energy absorption is reduce by 7%-20%under high velocity impact.The relative density affects the plateau stress and energy absorption capacity of the coupled honeycomb structure.
万方数据
维普
