*FIBER DISPERSION

Define the second-order orientation tensor of fiber in a composite material.

This option is used to define the second-order orientation tensor of fiber in a composite material. The second-order orientation tensor is used to compute the orientation-averaged elastic modulus and thermal expansion coefficient of the composite material. This option is relevant only when used with the ELASTIC, CONDUCTIVITY, and EXPANSION options.

This page discusses:

See Also
In Other Guides
Defining the Elasticity of a Short-Fiber Reinforced Composite
Defining Thermal Expansion for a Short-Fiber Reinforced Composite
Conductivity
Conductivity

Products Abaqus/Standard Abaqus/Explicit

Type Model data

LevelModel

Optional parameters

CLOSURE

This parameter is used to specify the closure approximation used to compute the fourth-order orientation tensor using the second-order orientation tensor.

Set CLOSURE=FITTED to use the orthotropic fitted (ORF) closure approximation.

Set CLOSURE=HYBRID to use the hybrid closure approximation.

Set CLOSURE=ORE to use the orthotropic equivalent of the natural (ORE) closure approximation.

Set CLOSURE=QUADRATIC (default) to use the quadratic closure approximation.

Set CLOSURE=SMOOTH to use the orthotropic smooth closure approximation.

Data line to define the components of the second-order orientation tensor in a local system aligned with principal directions using a distribution in Abaqus/Standard

First (and only) line
  1. Distribution name.

Data line to define the components of the second-order orientation tensor in a local system aligned with principal directions

First (and only) line

  1. Maximum principal value of the orientation tensor, a 1 .

  2. Mid principal value of the orientation tensor, a 2 .

  3. Minimum principal value of the orientation tensor, a 3 .