Modeling, Testing and Numerical Simulation on Hot Forming of HSS

Abstract

The thermal‐mechanical‐transformation coupled relationship of microalloy steel has important significance in forming mechanism and numerical simulation of hot forming. Tensile and quenching experiments are implemented at high temperature, and then the thermal‐mechanical‐transformation coupled constitutive models of hot forming are developed. Based these models, the nonlinear large‐deformation dynamic explicit finite element equations are proposed. The phase transformation latent heat is introduced into the analysis of temperature field during the hot forming process. Based on the independently developed commercial CAE software for sheet metal forming, named KMAS (King‐Mesh Analysis System), the numerical simulation module of hot forming is developed, which considers multi‐field coupled models, nonlinear and large deformation analysis. Then the hot forming process of a reinforced beam inside the automobile door is simulated by the KMAS software, and compared with its hot forming experimental testing. The experimental results indicate the validity and efficiency of the present multi‐field coupled constitutive models and numerical simulation software KMAS of hot forming.