Numerical Simulation of Residual Stresses in Thermo Coupled Wire Drawing Process
by
Roumen Iankov
Institute of Mechanics, Bulgarian Academy of Sciences

The model of thermo coupled plastic deformation in cold wire-drawing is considered.

Due to the plastic deformation in wire-drawing, most of the mechanical energy expended in the deformation process is converted into heat and the remainder is stored in the material. The stored energy is associated with residual stress generated in the wire after plastic deformation and unloading as well as with the creation of lattice imperfections. It means that the stress in free-force state are residual stress in wire. The nature of this residual stress is plastic deformation as well as changes on micro-level. The proposed model and numerical simulation of residual stresses in wire drawing is used to optimize the die-design and to reduce the residual stresses in final product. The nessesary condition for determination of load-free stage and determination of steady state stage are proposed. 2-d axysimetric boundary value problems will be considered.

Date received: January 26, 2000

Copyright © 2000 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # caeb-13.