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A new rigid‐viscoplastic model for simulating thermal strain effects in metal‐forming processes
Author(s) -
Dvorkin Eduardo N.,
Toscano Rita G.
Publication year - 2003
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.833
Subject(s) - viscoplasticity , stiffness , thermal , materials science , matrix (chemical analysis) , metal forming , stiffness matrix , mechanics , finite element method , composite material , thermodynamics , constitutive equation , physics
Abstract A new rigid‐viscoplastic model that includes the effect of thermal strains when modelling steady‐state metal‐forming processes was developed. A symmetric approximation to the resulting non‐symmetric stiffness matrix was derived. The thermo‐mechanical flow formulation was implemented using the pseudo‐concentrations technique. The new formulation was numerically tested showing that it provides reliable results. Copyright © 2003 John Wiley & Sons, Ltd.