Composite Modeling

Composite modeling techniques used in Radioss.

Each Layer with at Least One Solid

The model is large which leads to high accuracy results but need more computation resource.

Figure 1.

Mixed Approach (Middle Layer Thick)

Defines shells for top and bottom layer and solid for middle layer.

Figure 2.

Sandwich Shell Approach

Use only one shell element through the thickness. Use different materials to define multiple layers.

Figure 3.
In composite shell modeling there are two types of problems.
  • The first is composite shell with isotropic layers (orthotropic in z direction). For example, by Windshield modeling. Where, material LAW27(PLAS_BRIT) or LAW36 (PLAS_TAB) can be used.
  • The second is composite shell with orthotropic layers (orthotropic in x, y and z). For example, Sandwich shell with external fiber glass layers and internal foam layer. Where, material LAW25 (COMPSH) and all shell formulation can be used, except for QEPH.