Finite Element Analysis of Sheet Metal Airbending.pdf

PROCEEDINGS OF WORLD ACADEMY OF SCIENCE, ENGINEERING AND TECHNOLOGY VOLUME 26 DECEMBER 2007 ISSN 1307-6884 Finite Element Analysis of Sheet Metal Air- bending Using Hyperform LS-DYNA Himanshu V. Gajjar, Anish H. Gandhi, and Harit K. Raval springback predictions are important to maintain the Abstract—Air bending is one of the important metal forming geometric tolerance of the finished part. Springback refers to processes, because of its simplicity and large field application. the elastic recovery of the non-uniformly distributed stresses Accuracy of analytical and empirical models reported for the analysis in a deformed part after the forming load is removed. Bend of bending processes is governed by simplifying assumption and do allowance is a parameter that compensate for the elongation of not consider the effect of dynamic parameters. Number of researches is reported on the finite element analysis (FEA) of V-bending, U- sheet in bending. bending, and air V-bending processes. FEA of bending is found to be very sensitive to many physical and numerical parameters. FE models must be computationally efficient for practical use. Reported work shows the 3D FEA of air bending process using Hyperform LS- DYNA and its comparison with, published 3D FEA results of air bending in Ansys LS-DYNA and experimental results. Observing the planer symmetry and based on the assumption of plane strain condition, air bending problem was modeled in 2D with symmetric boundary condition in width. Stress-strain results of 2D FEA were compared with 3D FEA result