Improvement of Springback Predictability after forming and trimming

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When a sheet metal forming operation, such as deep drawing, is followed by a trimming operation the numerical springback after trimming is influenced by physical parameters and loss of product stiffness due to cutting off the material. Moreover, it is affected by the finite element mesh disturbance due to numerical 3D trimming and the cutting process itself, which introduces stresses while trimming. A technique of taking into the account the stress state change due to the element mesh cutting is discussed in the present paper. This technique involves an accurate in-plane mapping of the state variables preceded by a mesh adaptivity procedure that confirms the trimline. The influence of this technique of stress state updating after trimming on the amount of the numerical springback of the whole product is the major question to be answered in this article. The appraisal of this technique with respect to the predictability of the physical springback is discussed.
Original languageUndefined
Title of host publication7th ESAFORM Conference on Material Forming
EditorsS. Storen
Place of PublicationTrondheim, Noorwegen
PublisherNorwegian University of Science and Technology
Number of pages4
ISBN (Print)82-92499-012-04
Publication statusPublished - 28 Apr 2004
EventESAFORM 2004: 7th ESAFORM Conference on Material Forming - Trondheim, Norway, Trondheim, Norway
Duration: 28 Apr 200430 Apr 2004
Conference number: 7


ConferenceESAFORM 2004
Abbreviated titleESAFORM
Other28-30 april 2004


  • METIS-222420
  • IR-59511

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