NUMERICAL AND EXPERIMENTAL INVESTIGATION ON SPRING BACK IN WARM BENDING OF AL-ALLOY SHEETS

Abstract

Springback is a very common and important phenomenon in sheet metal forming operations, which is caused by the elastic redistribution of the internal stresses after the removal of deforming forces. Spring-back compensation is completely essential for the accurate geometry of sheet metal components. Understanding about the springback in bending process gives an opportunity to modify the process beforehand which can produce accurate shape of the product. This saves a lot of money and time. In present work, a study of springback in V bending and U bending is performed. Also the effect of three different temperatures; 30°, 120° and 150° on the springback in the V bending and U bending is observed. An FEA of the V bending and U bending process is performed. Effect of temperature on the material property is considered while performing the analysis. The material considered is Aluminium alloy AA5083. Hill's isotropic yield and elastic plastic material model is used. ABAQUS/CAE is used to perform finite element analysis. The uniaxial tension test on the AA5083 was performed to calculate the input data for material modeling. The springback is predicted at three different temperatures and validated by experimantal results.