solid mixture¶

Module: solid

Category: material

Type string: "solid mixture"

Parameters¶

Name	Description	Default	Units
`density`	density	1	[M/L^3]
`solid`			[]
`mat_axis`			[]

Description¶

The material type for a mixture of unconstrained solids is solid mixture. This material describes a mixture of elastic solids that share the same reference configuration and same deformation gradient. It is a container for any combination of the unconstrained elastic materials.

The mixture may consist of any number of solids. The stress tensor for the solid mixture is the sum of the stresses for all the solids.

Material axes may be optionally specified within the material level. Within the material level, these represent the local element axes relative to the global coordinate system. If material axes are specified at both levels, they are properly compounded to produce local material axes relative to the global coordinate system. Material axes specified in the ElementData section are equivalent to a specification at the material level: they correspond to local element axes relative to the global system.

Example:

<material id="1" type="solid mixture">
  <solid type="neo-Hookean">
    <E>1000.0</E>
    <v>0.45</v>
  </solid>
  <solid type="ellipsoidal fiber distribution">
    <mat_axis type="vector">
      <a>0.8660254, 0.5, 0</a>
      <d>0,0,1</d>
    </mat_axis>
    <ksi>5, 1, 1</ksi>
    <beta>2.5, 3, 3</beta>
  </solid>
  <solid type="ellipsoidal fiber distribution">
    <mat_axis type="vector">
      <a>0.8660254,-0.5, 0</a>
      <d>0,0,1</d>
    </mat_axis>
    <ksi>5, 1, 1</ksi>
    <beta>2.5, 3, 3</beta>
  </solid>
</material>