Experimental and Analytical Studies Of Forming Limit Of AISI 1008 Steel And Comparison with Finite Element Analysis

Abstract

The use of sheet metal forming simulations has reduced lead-times and costs for the development of new forming Component significantly. The accuracy of the simulations is to a large extent dependent on the quality of the material properties provided as input to the simulations. Improving the quality of the material properties is the key factor in order to further increase the accuracy of the simulations. So Tensile Test is performed on AISI 1008 steel for determination of Forming Properties of AISI 1008 steel. This study is focused on the forming limit properties of sheet metal. The Purpose of this thesis is to investigate the possibility of replacing time consuming and costly experimental forming limit diagram (FLD) by theoretical and Finite Element Analysis Predicted ones. In this thesis some well-known methods for analytical Prediction of FLD are critically reviewed. The assumptions made in each method are emphasized and their effects on the predicted forming limits are demonstrated. An alternative method, based on Swift’s Maximum force criterion, is presented and its merits and demerits are evaluated in comparison with existing methods. Simulations are try out tools for reducing time consuming experimental work. So Finite Element Simulations of Limit Dome Height Test have been performed in order to find the FLD. There are many methods for finding the experimental FLD. In this Experimental work, Limiting Dome Height Test and Erichson test are performed for finding the FLD. Experimental Set up for Limiting Dome Height test is prepared. and find the Forming limit by circle grid analysis method. The accuracy of experimental FLD is large extent dependent on accuracy of circle grid and its measuring system.Finally, Experimental FLD is compared with the theoretical and FEA predicted ones.