A new type of thin-walled energy absorbing structure filled with negative Poisson's ratio lattice structure is proposed.The deformation failure mode and mechanical response of the new type of filled tube under compression load are investigated by quasi-static compression experiments and finite element numerical simulation.The theoretical prediction model of the average impact force is established,with the reliability of the model verified by finite element analysis.Then,the influence of the meso-design parameters of the lattice structure with negative Poisson's ratio on the compression resistance of the filled tube is studied.The results show that the failure mode of the filled tube under compression load is local buckling failure.Compared with the single thin-walled tube and lattice structure,the filled tube exhibits better compression resistance;Parameter analysis indicates clearly that the compression resistance of the filled tube can be significantly improved by increasing the wall thickness of the cell member and the included angle of the lower support rod,providing an important reference for the impact resistance optimization design of the lattice filling structure with negative Poisson's ratio.
维普
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