Critical plane method

This group of criteria expects that there is some unique critical plane to which the total damage in some point examined can be related. A position of the critical plane is influenced by an external loading or material parameters. There are different assumptions concerning its orientation. Here are the most often proposed variants:

* MSSR method (Maximum Shear Stress / Strain Range) – the maximum of the shear stress or strain range is looked for.

* MD method (Maximum Damage) – planes are scanned so that the maximum damage was found.

* CPD method (Critical Plane Deviation) – the critical plane is deviated from some specific plane by a defined angle related to material properties.

* MMES method (Maximum Modified Equivalent Stress) - use of this modified equivalent stress was implemented in order to understand the way FemFat works with it.

There is one important aspect concerning this type of solution. Although there can be more planes with very high level of loading, no interaction among these different potential break systems is expected.

multiaxial analysis

schemes of the planes examined

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