Dynamic Performance Of Cellular Metal Material With Cubic Structure

Cellular metal material is a new kind of fantastic material with low density,high stiffness and good performance of energy absorbing.There are many kinds of cellular metal materials with different structure and they were widely used in many fields.Dynamics performance of cellular metal material with cubic structure was studied in this paper,using theoretical analysis,finite element method and experimental research.Firstly,cellular metal material with cubic structure was analyzed theoretically,theoretical formula of peak dynamic stress was put forward using super folding element method with simplified model.Secondly,the deformation modes and energy absorption characteristics of cellular metal material with cubic structure was investigated using finite element method by the software LS-DYNA.The results showed the simulation value of peak dynamic stress matched the theoretical value in error range.A fitting formula of peak dynamic stress about impact velocity and structure parameters was put forward.Samples of cellular metal material with cubic structure were made out using sheet metal stamping,laser welding and adhesive bonding processes.The static compression experiment and dynamic compression experiments were conducted to analyze dynamics performance.The results provided a proof of the reliability of the finite element simulation.Dynamic performance of three-dimensional porous metal material was analysed systematically.The topological structure of porous metal material was enriched,the study is of great significance in the field of cellular metal material.