u3.13.05 Models AXIS_SI, D_ PLAN_SI, C_ PLAN_SI

Summary:

The models AXIS_SI, D_ PLAN_SI, C_ PLAN_SI (Phenomenon: mechanical) correspond to finite elements whose support meshes are surface.

The suffix _SI means: Sub-Integrated: the integration of terms relating to the laws of behavior is done in a reduced way (Gauss point scheme of lower order than full integration modeling).

The modeling assumptions are as follows:

• AXIS_SI for axisymmetry (Fourier mode 0) along the \(Y\) axis,

• D_ PLAN_SI for plane deformations,

• C_ PLAN_SI for plane constraints.

This document describes for models:

• the degrees of freedom carried by the finite elements that support modeling,

• the related support meshes,

• the loads supported,

• non-linear possibilities,

• test cases implementing the models.

• 1. Discretization
  • 1.1. Degrees of freedom
  • 1.2. Support mesh for stiffness matrices
  • 1.3. Cargo support mesh
• 2. Supported loads
• 3. Nonlinear possibilities
  • 3.1. Laws of behavior
  • 3.2. Deformations
• 4. Examples of implementation: test cases