سال انتشار: ۱۳۹۱
محل انتشار: بیستمین کنفرانس سالانه مهندسی مکانیک
تعداد صفحات: ۴
Hashem Zamanian – Center of Excellence in Design, Robotics and Automation, Department of Mechanical Engineering, Sharif University
Mohammad Kankarani Farahani – Center of Excellence in Design, Robotics and Automation, Department of Mechanical Engineering, Sharif University
Ahmad Assempour – Professor of Mechanical Engineering Department, Sharif University of Technology, Tehran, IRAN
The inverse finite element method was derived from ideal forming to predict the initial blank of sheet forming process and the strain distribution according to the geometry of final product. In this paper an inverse finite element method has been presented to obtain strain and stress distribution in final shape and design initial blank of deep drawing process. The procedure is as following: First, strain distribution in deep drawn part is estimated by kinematics formulations. Then by using Hill’s anisotropic plasticity and according to the associated plastic flow rule, stress distribution is obtained in deep drawn composite part. Finally, initial blank is designed by considering external forces between the sheet and the tools. The accuracy of the present method is evaluated by comparison with ABAQUS for a square cup example. The results are in good agreement with the results of ABAQUS.