Journal article
Die shape design optimization of sheet metal stamping process using meshfree method
International journal for numerical methods in engineering, Vol.51(12), pp.1385-1405
08/30/2001
DOI: 10.1002/nme.181
Abstract
A die shape design sensitivity analysis (DSA) and optimization for a sheet metal stamping process is proposed based on a Lagrangian formulation. A hyperelasticity‐based elastoplastic material model is used for the constitutive relation that includes a large deformation effect. The contact condition between a workpiece and a rigid die is imposed through the penalty method with a modified Coulomb friction model. The domain of the workpiece is discretized by a meshfree method. A continuum‐based DSA with respect to the rigid die shape parameter is formulated using a design velocity concept. The die shape perturbation has an effect on structural performance through the contact variational form. The effect of the deformation‐dependent pressure load to the design sensitivity is discussed. It is shown that the design sensitivity equation uses the same tangent stiffness matrix as the response analysis. The linear design sensitivity equation is solved at each converged load step without the need of iteration, which is quite efficient in computation. The accuracy of sensitivity information is compared to that of the finite difference method with an excellent agreement. A die shape design optimization problem is solved to obtain the desired shape of the workpiece to minimize spring‐back effect and to show the feasibility of the proposed method. Copyright © 2001 John Wiley & Sons, Ltd.
Details
- Title: Subtitle
- Die shape design optimization of sheet metal stamping process using meshfree method
- Creators
- Nam Ho KimKyung Kook ChoiJiun Shyan Chen
- Resource Type
- Journal article
- Publication Details
- International journal for numerical methods in engineering, Vol.51(12), pp.1385-1405
- Publisher
- John Wiley & Sons, Ltd; Chichester, UK
- DOI
- 10.1002/nme.181
- ISSN
- 0029-5981
- eISSN
- 1097-0207
- Number of pages
- 21
- Grant note
- NSF/DARPA OPAAL (DMS98‐74015) Ford University Research Program (URP 97‐723R)
- Language
- English
- Date published
- 08/30/2001
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984064211702771
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