*INITIAL CONDITIONS
Keywords: ccx

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*INITIAL CONDITIONS

Keyword type: model definition

This option is used to define initial temperatures and initial stresses. There are two parameters: TYPE and USER. The parameter TYPEThere is required: TYPE. TYPE=STRESS is used to define initial stresses, TYPE=TEMPERATURE is used to define initial temperatures and TYPE=VELOCITY defines initial velocities (for dynamic calculations).

For shell elements TYPE=TEMPERATURE can be used to define an initial temperature gradient in addition to an initial temperature. The temperature applies to nodes in the reference surface, the gradient acts in normal direction. For beam elements two gradients can be defined: one in 1-direction and one in 2-direction. Default for the gradients is zero.

The parameter USER can only be used if TYPE=STRESS is specified. In that case, the user must define the initial stresses by user routine sigini.f.

First line:

- *INITIAL CONDITIONS
- Enter any needed parameters and their values.

Following line for TYPE=STRESS if USER is not specified:

- Element number.
- Integration point number.
- Value of first stress component.
- Value of second stress component.
- Etc.

Repeat this line if needed. The stress components should be given in the form of second Piola-Kirchhoff stresses.

There is no line following the first one for TYPE=STRESS,USER.

Following line for TYPE=TEMPERATURE:

- Node number or node set label.
- Initial temperature value at the node.
- Initial temperature gradient in normal direction (shells) or in 2-direction (beams).
- Initial temperature gradient in 1-direction (beams).

Repeat this line if needed.

Following line for TYPE=VELOCITY:

- Node number or node set label.
- Degree of freedom in the GLOBAL coordinate system.
- Magnitude of the velocity.

    Examples:

    *INITIAL CONDITIONS,TYPE=TEMPERATURE
    Nall,273.

assigns the initial temperature T=273. to all nodes in (node) file Nall.

    *INITIAL CONDITIONS,TYPE=VELOCITY
    18,2,3.15

assigns the initial velocity 3.15 to degree of freedom 2 of node 18.

Example files: beam20t, beamnlt, beamt3, resstress1, resstress2, resstress3.

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