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The equivalent von Mises Stress is the default Failure Criterion. It can be used for all material properties (Isotropic, 3D Transversely Isotropic and 3D Orthotropic). The Stress Goal is calculated with the chosen Safety Factor and the tension strength in axis direction (build direction) of the entered material. For directional dependent stress limits, the von Mises Stress is not suitable and one of the following Failure Criteria should be used.
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Scale Target Stress in build direction
With the FFF Thumb Rule Scale Target Stress in build direction, a simplified version of the directional dependent Tsai-Hill Failure Criterion can be used to take directional dependencies into account. The FFF Thumb Rule Scale Target Stress in build direction can be used in combination with Isotropic material behaviour. Thus, the Tension Strength in build direction can be modified by scaling only this one value. The Shear Strength is calculated automatically with a Thumb Rule [0.6 * Tension Strength]. This is especially useful for manufacturing methods like FFF where the material limit in building direction differs from the transversal in-plane directions.
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