THINNING AND SPRING BACK OF ALUMINIUM SHEET METAL DURING L - BENDING OPERATION

摘要

Sheet metal bending process is one of the most frequently used manufacturing operations in industry. The development optimization of the bending process is connected with time consuming and costly. Therefore, the finite element simulation of the process could be helpful tool for the designer and quality assurance of the product. Aluminium has played a great role in the development of civilization. The accuracy of the damage contour in the Aluminium sheet is directly related to the quality. After bending spring back occurs upon the removal of the tool. The amount of elastic recovery depends on the stress level and the modules of the elasticity of the material. This paper describes a finite element for L- bending process of the Aluminium sheet metal which allow for the prediction of the elastic spring back. Material is considered as elasto-plastic after yielding and plastic deformation is computed using Newton Raphson method.