### 3.11.3. Definition of General User-Defined Fields in ACP-Pre

Workbench Engineering Data allows you to define the Isotropic and Orthotropic Elasticity as well as Stress and Strain limits as a function of up to 9 user-defined scalar field variables. Engineering Data predefines the Temperature, Degradation Factor, and Shear Angles fields. If necessary, you can define a custom set of field variables. In the subsequent finite element analyses, the state of the Temperature field is defined in directly in Mechanical, through Transient Thermal analysis, or by an External Data analysis component. The Shear Angle and Degradation Factor fields are defined in ACP-Pre. Any other user-defined fields should be defined in ACP-Pre.

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