r5.03.34 Law of viscoelastic behavior REGU_VISC_ELAS

Summary:

To regularize certain forms of quasistatic instabilities, a regularization technique accessible in STAT_NON_LINEvia the REGU_VISC keyword is based on the superposition of behavioral constraints with viscoelastic constraints, the latter being able to give the system the expected stabilization. The law of behavior REGU_VISC_ELAS governs the evolution of these regularization constraints via a Maxwell model. It is only accessible through this regularization feature.

• 1. Field of application
  • 1.1. Purpose
  • 1.2. Material parameters
  • 1.3. Deformation measurements
  • 1.4. Internal variables
• 2. Continuous model
  • 2.1. Behavioral equations
  • 2.2. Definition of energies
• 3. Digital integration
  • 3.1. Discretized equations
  • 3.2. Tangent matrix
  • 3.3. Calculation of energies
• 4. Description of document versions
• 5. Bibliography