Abstract

To investigate the effect of material and precess variables on stamping formability of sheet materials, simulations for the cup drawing and the Yoshida buckling test were carried out using ABAQUS, commercial nonlinear finite element analysis code. The various factor effects on stamping formability of sheet materials were analyzed by the designed process according to Taguch's orthogonal array experiment. Cup drawing simulation showed that local neckling was very sensitive to plastic anisotropy parameter of sheet material and friction coefficient between sheet and tool interface. Simulations for the Yoshida buckling test have clarified that buckling behaviour of sheet material was mostly susceptible to yield stress and sheet thickness mostly. However, plastic anisotropy parameter and strain hardening coefficient affect moderately buckling behaviour of steel sheets after the buckling initiation.

Keywords

• Stamping Formability;
• Process Variable;
• Material Variable;
• Deep Drawing Test;
• Yoshida Bucking Test;
• Taguchis Orthogonal Array Experiment;
• Finite Element Analysis

• 스템핑 성형성;
• 공정변수;
• 재료변수;
• 딥드로잉 실험;
• 요시다 좌굴실험;
• 타구치의 직교배열실험법;
• 유한요소해석;