A computer simulation methodology of metal perforation

A Roos*, J.T.M. de Hosson, H.H.M. Cleveringa, E. van der Giessen

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

Samenvatting

In this paper, shear deformation at high strain rates is modelled with the framework of discrete dislocation plasticity. The total stress state is split into the stress state due to the dislocations in an infinite medium, and the complementary image stress, which is enforced by a finite element solution. Sources and obstacles are put into the material, and constitutive rules are implemented for the creation and annihilation of dislocations. High-velocity stress and displacement fields are used, as well as the Gillis-Gilman-Taylor drag relation. When the velocity of a dislocation approaches that of the local shear wave speed, the stress and displacement fields undergo a Lorentz-contraction in the direction of motion. The issue is addressed whether these local changes in stresses and displacements affect the overall stress-strain curves significantly. The dependence on temperature is briefly discussed.

Originele taal-2English
TitelSIMULATION OF MATERIALS PROCESSING: THEORY, METHODS AND APPLICATIONS
RedacteurenJ Huetink, FPT Baaijens
Plaats van productieLEIDEN
UitgeverijA.A. Balkema Publishers
Pagina's303-308
Aantal pagina's6
ISBN van geprinte versie90-5410-970-X
StatusPublished - 1998
Evenement6th International Conference on Numerical Methods in Industrial Forming Processes (NUMIFORM 98) - , Netherlands
Duur: 22-jun.-199825-jun.-1998

Other

Other6th International Conference on Numerical Methods in Industrial Forming Processes (NUMIFORM 98)
Land/RegioNetherlands
Periode22/06/199825/06/1998

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