InitialStrain

Type:2-Tensor, or section
Range:[v_1, …, v_9]
Default:-/-
Appearance:optional

Specifies the stress free (initial) strain \TField{\varepsilon}^{(\init)} of a body. The strain is dimensionless.

A constant initial strain can be defined by assigning a rank-2 tensor:

# define a constant initial strain
InitialStrain = [..., ... , ...,
                 ..., ... , ...,
                 ..., ... , ...]

For more general cases, an initial strain may be given as a section in order to deal with space, time, and parameter dependent definitions:

# define an initial strain field as a section
InitialStrain {
  Coiling {...}
  ThermalExpansion {...}
  ...
}

Field definitions within this section are summed up. Consult the subsequent sections to see which types of field definitions are allowed.