Topology Optimization of Strain Energy Constrained 2D Elasto-Plastic Truss

Topology optimization in energy-absorbing structures, particularly in the context of elasto-plastic truss elements, presents a crucial avenue for engineering innovation.This paper extends from a one-dimensional toy model to a two-dimensional perfect elasto-plastic truss structure based on evolutionary structural optimization, examining diverse design variables, optimization strategies, structural sizes, and responses to energy absorption thresholds.This study reveals the superiority of certain design variables and optimization strategies, while highlighting challenges such as size dependency and mesh sensitivity.Furthermore, we unveil the nuanced impact of different energy distribution strategies on final topology structures.This work not only enriches our understanding of topology optimization for energy absorption but also inspired for future research and refinement in this domain.