Sets up an initial stress/strain loading The number of values required will depend on the element type and whether the load is to be initial or residual. For initial loading, both stresses and strains should be provided. For residual loading, only stresses should be provided To determine the number of stress values that are appropriate to a particular element type, see the element reference manual The element type can be given in either of two different ways - by feature type and description, e.g. "line - thick non linear beam" or by element name, .e.g "BMS3". Once defined, a stress and strain load can be assigned to any element type of the same stress model.
| type | string | 'Initial' or 'Residual' |
| values | array of VariationAttr or double | see above |
| eleType1 | string | feature type - e.g. "line", "surface" etc or element type - e.g. "BMS3", "QTS8" etc |
| eleType2 | optional string | Only needed if 'eleType1' above is given as a feature type, in which case further clarifies element type, e.g. "Thick nonlinear beam" |
| eleType3 | optional integer | Only needed if 'eleType1' above is given as a feature type, in which case further clarifies 2d or 3d (by value 2 or 3) |
| Return value | Pointer to this object | Allows multiple function calls to be chained together |
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