A Comparative Study on Elastic-Plastic -Dynamci Analysis of Sheet Metal Forming

탄소성 동적해석시 해에 미치는 여러 인자들의 비교연구

Explicit dynamic finite element analysis has been used widely in the field of sheet metal forming. However in using the analysis technique there are some parameters which are not clearly defined so that engineers may obtain inaccurate solutions In the present study parameters such as time step damping ratio penalty constant and punch speed were investigated on their influence to the solution behavior. Considered forming processes are plane stain bending by a punch and axisymmetric deep drawing.