Crashworthiness Analysis and Multi-Objective Optimization for Concave I-Shaped Honeycomb Structure

Due to their superior structural and mechanical properties, materials with negative Poisson’s ratio are of increasing interest research scholars, especially in fuel-efficient vehicles. In this work, a new concave I-shaped honeycomb structure is established by integrating the re-entrant hexagon beam structure, its characteristics energy absorption properties investigated. The effect parameters on analyzed using finite element model. results show that both specific peak impact force decrease increase cellular length vertical short height, horizontal thickness. To obtain smaller larger mass, four cell sizes were optimized Latin hypercube sampling, Gaussian radial basis function, non-dominated sorting genetic algorithm II (NSGA-II). Compared original design, SEA increased 44.175%, PCF 25.857%. Meanwhile, mass decreased 31.140%. Hence, optimal has better crashworthiness.