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Sheet forming modeling by inverse approach and pseudo inverse approach with damage effects

Authors
Publisher
Elsevier Ltd
Identifiers
DOI: 10.1016/b978-008044046-0.50076-2
Disciplines
  • Computer Science
  • Design

Abstract

Publisher Summary A simplified method called “inverse approach” (IA) has been developed for sheet forming modeling. The IA is based on the knowledge of the final workpiece shape. Starting with the element mesh on the workpiece, an iterative resolution allows finding the original node positions on the initial flat blank satisfying the equilibrium in the final workpiece and then the strains and stresses are calculated. The assumptions of proportional loading and simplified tool actions lead to a “one-step” algorithm. This IA is less accurate but much faster than classical incremental approaches; it is widely used in the preliminary design of forming tools. Numerous tests have proved that the IA gave good strain estimation but poor stress prediction. The recent pseudo IA largely improves the stress evaluation by using deformation history, which allows the damage consideration in the sheet forming modeling by simplified methods.

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