Determination of springback in sheet metal forming

Abstract

Springback is the partial return of the metal to its original shape when bending forces are removed. The forming of sheet metal requires an understanding of a wide range of technical knowledge, the manufacturing application standard, the interaction of processing and the material properties. In dealing with springback problem, three approaches have been commonly used: Analytical methods, Experimental methods, and Numerical methods. Purely theoretical studies or purely experimental analysis or both of them are encountered. Some researches prepare information just for the sake of analytical analysis of solid mechanics, and some others use available finite element package programs like (ABAQUS, ANSYS, PAM-STAMP, etc.) and perform test-runs for the numerical analysis of the workpiece in hand. Sometimes theoretical and numerical data are compared with experimental data in order to have a proof of the quality of the algorithms, which are prepared to predict the springback. In this research, a survey of the previous research work on springback prediction and compensation in die manufacturing industry has been investigated.