Initial solution estimation to speed up inverse approach in stamping modeling. (English) Zbl 1063.74512
Summary: Nowadays, simplified inverse or one-step approaches to the sheet forming modeling are increasingly used in the automobile industry, since they allow to quickly realize the preliminary design and especially to optimize the process parameters. These methods often based on implicit static algorithms cause sometimes convergence problems because of strong nonlinearities. This paper deals with several initial guess methods to speed up the convergence of the implicit static solver used in the inverse approach for stamping modeling. The blank’s mesh as initial solution is obtained by geometrical considerations based on the known shape of the final 3D workpiece. Three algorithms for the estimation of the blank’s mesh have been developed and compared. The application to several industrial problems shows their efficiency and performance.
MSC:
| 74G75 | Inverse problems in equilibrium solid mechanics |
| 74C15 | Large-strain, rate-independent theories of plasticity (including nonlinear plasticity) |
| 74S05 | Finite element methods applied to problems in solid mechanics |
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