Determination of Ductile Damage Parameters Using Hybrid Particle Swarm Optimization

摘要: Damage models are widely used to describe the ductile damage and fracture of metals. This paper proposes a new approach determine parameters Gurson-Tveergard-Needleman model, which uses load–displacement curve coupled with finite element method. The was obtained from tensile test smooth specimen contained information about behavior tested material. principle identification is minimize deviation between experimental simulated curves by hybrid particle swarm optimization. As combination optimization annealing, an economical effective algorithm identify parameters. identified also verified testing simulating deformation shapes for determination. Tests simulations notched specimens were carried out discuss transformability It observed that value critical void volume fraction model decreases increase stress triaxiality.