u3.14.01 Mechanical 3D and 3D_SI models

Summary:

This document describes for 3D and 3D_SI mechanical 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 modeling.

3D and 3D_SI models (phenomenon MECANIQUE) correspond to finite elements whose support meshes are volume.

The suffix _SI stands for 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).

• 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