3D Dynamic Simulation Analysis Of Thin-Wall Parts Forming Process Based On ANSYS/LS-DYNA

Due to limitations of the technique, the lead time and the development cost in the design thin wall parts, an acceptable forming solution is not easy to obtain with a large number of trial-and-error runs. Numerical simulation technology, a quickly developing engineering analysis method, has laid a foundation for the automotive of the forming process design. It has been an indispensable tool to speed up the development of automotive. Most of the existing research on automotive panel forming is focused on verifying whether product defects appear. However, comprehensive and systematic work has rarely been done on how to improve the performance figures of automotive panel in the design thin wall parts. Optimization of funning process is a very difficulty problem due to design nonlinearity and huge computational cost of numerical simulations. Therefore, there is notable engineering significance and academic value to seek for a numerical simulation based optimization method for automotive panel forming process.In this paper, then on-linear explicit finite element theory is studied systematically, which include material models, element algorithm and contact handling methods etc. The FE modeling methods of stamping simulation are investigated and a comparatively deep study on the key points of process. And on the basis of them, the forming simulation of large automotive panels is made and results analyzed.1, The system expounded the thin-walled parts stamping simulation of nonlinear finite element theory, and in reference to the relevant literature is given on the basis of Barlat Hill and the incremental model of the elasto-plastic constitutive equation for explicit expression and expounds suitable for the simulation of stamping BT shell element contact and friction theory and the handling of the issue.2, In this paper, the mechanism of wrinkling, classification, characteristics, and the measures to eliminate wrinkles, also discussed the tension classification, prediction and control methods. 3, In front of the establishment based on the finite element model, virtual punch ram speed, blank holder ram displacement, and other parameters are optimized for the project.