fixedDisplacementFvPatchVectorField

Description

The fixedDisplacement boundary condition allows imposing a fixed displacement on a patch. The displacement can be provided as a constant value or as a time-dependent series.

Warning

If applied to the incremental displacement field DD when using an incremental mechanics solver, the imposed fixed value is intended as an increment not as total displacement.

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Options

The fixedDisplacement fvPatchField can be selected in the patch subdictionary inside the boundaryField subdictionary of the displacement field.

Parameters in the patch subdictionary for fixedDisplacement:

displacementSeries	A subdictionary specifying the time series of displacement values.
value	Only used if displacementSeries is not present, it sets the fixed displacement value (constant in time).

Parameters in the subdictionary displacementSeries:

type	Specifies the type of the series, e.g., table.
values	A list of time-value pairs defining the displacement series. The displacement is specified in vector form for each time point.
outOfBounds	Optional keyword to handle values outside the defined time range. Possible values: clamp or extrapolate. Default: clamp.
interpolationScheme	Optional keyword to define the interpolation method between time points. Possible values: linear or step. Default: linear.

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Usage

To apply the fixedDisplacement boundary condition to a given patch, the following example can be used as a template:

cladOuter
{
    type            fixedDisplacement;

    // For a time-dependent series
    displacementSeries
    {
        type                table;

        values
        (
            (0.0 (0 0 0))
            (100.0 (0.1 0 0.1))
        );

        outOfBounds         clamp;     // Optional: out-of-bounds handling
        interpolationScheme linear;    // Optional: interpolation method
    }

    // // Alternatively, for a fixed displacement
    // value           uniform (0.1 0 0.1);
}