Comparative analysis on crashworthiness of a novel bamboo-like hexagonal gradient hierarchical multicellular tube
A novel bamboo-like hexagonal gradient hierarchical multicellular tube(BHGHMT)was designed.A theoretical solution of the mean crashing force for hexagonal single-gradient hierarchical multicellular tube(HSGHMT)is derived by using the super-folded element method,and the experimental study of the square tube is carried out.The accuracy of the finite element numerical model is verified by using the theoretical solution and the experimental results.The crashworthiness performance of BHGHMTs with different wall thicknesses was analyzed using the validated numerical model.Finally,the crashworthiness performance of the BHGHMT and the conventional square tube(ST),hexagonal tube(HT),and HSGHMT under the same mass,the same initial peak force and the same energy absorption were compared.The research results show that the proposed BHGHMT can effectively reduce the initial peak force and improve the crushing force efficiency.The crashworthiness performance of the BHGHMT is better than that of the conventional ST,HT and HSGHMT under the same mass,the same initial peak force and the same energy absorption.The research results can provide a reference for the innovative design of gradient hierarchical multicellular tubes.
万方数据
维普
