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Feature: Tresca plasticity and nonlinear isotropic hardening

This MR includes

  • Implementation of von Mises / Tresca dissipation in one dissipation functional with runtime switch
  • Assembling data structures in dune-functions style assemblers (isotropic-hardening.cc)
  • Dropping dune-pdelab (primalplasticity-p1p0.cc)
  • Encapsulation of all parameters into a class
  • Various hardening rules: linear kinematic, (non-)linear isotropic with runtime parameters
  • 2D/3D models for von Mises
  • 3D model for Tresca (2D Tresca is equivalent to 2D von Mises)
Edited by Jaap, Patrick

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