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A quasi‐static boundary value problem in multi‐surface elastoplasticity: part 2—numerical solution
Authors:Martin Brokate  Carsten Carstensen  Jan Valdman
Abstract:Multi‐yield elastoplasticity models a material with more than one plastic state and hence allows for refined approximation of irreversible deformations. Aspects of the mathematical modelling and a proof of unique existence of weak solutions can be found in part I of this paper (Math. Models Methods Appl. Sci. 2004). In this part II we establish a canonical time–space discretization of the evolution problem and present various algorithms for the solving really discrete problems. Based on a global Newton–Raphson solver, we carefully study and solve elementwise inner iterations. Numerical examples illustrate the model and its flexibility to allow for refined hysteresis curves. Copyright © 2005 John Wiley & Sons, Ltd.
Keywords:variational inequalities  elastoplasticity  phase transition multi‐surface model  multi‐yield Prandtl–  Ishlinskii model  hysteresis  finite element method
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