Abstract
The paper considers an hp-finite element discretization for a model problem of elastoplasticity with linear kinematic hardening. The use of biorthogonal basis functions for the discretization of a mixed formulation enables the decoupling of the constraints resulting from the involved plasticity functional. This yields a nonlinear equation which allows the application of various solution schemes, e.g. a semi-smooth Newton solver. Numerical experiments demonstrate the robustness of a semi-smooth Newton solver based on the proposed decoupling with respect to mesh size, polynomial degree and projection parameter.
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Bammer, P., Banz, L., Schröder, A. (2023). hp-Finite Elements with Decoupled Constraints for Elastoplasticity. In: Melenk, J.M., Perugia, I., Schöberl, J., Schwab, C. (eds) Spectral and High Order Methods for Partial Differential Equations ICOSAHOM 2020+1. Lecture Notes in Computational Science and Engineering, vol 137. Springer, Cham. https://doi.org/10.1007/978-3-031-20432-6_7
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