CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

THE DEFINITION OF INCIPIENT NECKING AND ITS IMPACT ON EXPERIMENTALLY OR THEORETICALLY DETERMINED FORMING LIMIT CURVES

Mats Sigvant ; Kjell Mattiasson (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Mats Larsson
Proceedings of IDDRG'08, The International Deep Drawing research Group, June 16-18, Olofström, Sweden, Edited by Nader Asnafi (2008)
[Konferensbidrag, refereegranskat]

In the current paper various methods for Forming Limit Curve (FLC)evaluation are presented and discussed. The capabilities of modern optical systems for strain measurement are demonstrated. A method for limit strain evaluation, based on the onset of instability, is described in detail. The method can be applied for the evaluation of experimental strains, as well as of strains from Finite Element (FE) simulations. Three different approaches have been applied for the determination of FLCs for a DP600 steel. The method used for limit strain evaluation is shown to have a considerable influence on the level of the resulting FLC. Also results from FE-simulations of the same tests are presented. The importance of always questioning how a certain FLC has been evaluated is emphasized.

Nyckelord: Limit strain, FLC, FLD, Incipient Necking, Sheet Metal Forming Simulation



Denna post skapades 2008-08-19. Senast ändrad 2008-08-19.
CPL Pubid: 73115

 

Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Material- och beräkningsmekanik (2005-2017)

Ämnesområden

Övrig teknisk mekanik
Övrig teknisk materialvetenskap

Chalmers infrastruktur