Sheet Metal Forming And Springback Finite Element Numerical Simulation Analysis

The sheet metal forming is an advanced, high quality, efficient, lowconsumption and low cost manufacture technology. It has been widely appliedin all kinds of mechanical industry. At the same time, sheet metal formingis a complicated elastic and plastic mechanical process which includesnon-liner problem of material models, boundary condition, element algorithmand contact handling methods etc. So when faced complicated accessories, thedie designed by the engineer only through traditional experience and formulassometimes can not reach the technical demand of products.With the development of computer technology, engineers begin to usecomputer simulation technology to aid the tool's design. Lots of practicesprove that finite element method is the best way to simulate the process ofsheet metal forming. Using the technology of CAE can remarkably improves thequality and shortens the cycle of die design. In this paper, numericalsimulations of sheet metal stamping and springback process about an automobilepanel are investigated and the rules of some selected processing parametersare found through comparatively deep study.On the section of stamping simulation, the infection to the result aboutthe distribution of drawbead, the original sharp of the blank, the attributeof the meshing element, the friction coefficient between the blank and thedie, the techno]ogy of adaptive meshing are mainly investigated. The effectingrules of these processing parameters above are found.The phenomenon of Springback is one of the main effects for the geometryof the stamping parts. The accuracy and the convergence of the simulation arealso the key points for the springback. In this paper, the whole process abouthow to deal with springback problem using the software of LS-DYNA is introducedin detail. And the infection to springback result about the clearance betweenthe up-die and the low-die, the thickness of the blank and the demand amountof the meshing element for the blank are analyzed through computer simulationtest. At last, the effecting rules of these processing factors to thespringback result are found.