Estimation of the Initial Blank Shape and Strain Distribution for Complicated Geometries in Sheet Metal Forming by a Nonlinear Inverse Finite Element Method

Muhammad Farahani; Ahmad Assempour

doi:10.4271/2012-01-0019

2012-04-16

Estimation of the Initial Blank Shape and Strain Distribution for Complicated Geometries in Sheet Metal Forming by a Nonlinear Inverse Finite Element Method 2012-01-0019

A nonlinear inverse finite element method is developed for estimation of initial blank shape and strain distribution in final shape. This method often based on implicit static algorithms, causes sometimes convergence problems because of strong nonlinearities. In order to avoid the converging problems, especially in the quasi vertical walls, an appropriate initial guess is introduced. By using this initial guess, the number of iterations in the nonlinear numerical solution is decreased, solution speed is significantly increased and complicated geometries can be analyzed by this method with good accuracy. Application to a Srail part shows good agreement between commercially available finite element software and IFEM results.

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Estimation of the Initial Blank Shape and Strain Distribution for Complicated Geometries in Sheet Metal Forming by a Nonlinear Inverse Finite Element Method 2012-01-0019

SAE MOBILUS