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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

Farahani, M ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.4271/2012-01-0019
  3. Publisher: SAE , 2012
  4. Abstract:
  5. 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
  6. Keywords:
  7. Blank shapes ; Complicated geometry ; Convergence problems ; Finite element software ; Initial guess ; Inverse finite element methods ; Number of iterations ; Numerical solution ; Static algorithms ; Strain distributions ; Strong nonlinearity ; Vertical wall ; Computer software ; Exhibitions
  8. Source: SAE Technical Papers ; 2012
  9. URL: http://papers.sae.org/2012-01-0019