Strain biaxial ratio

For critical (maximum shear) plane evaluation, the durability solver assumes that the loading is proportional, and that the strain biaxial ratio, the ratio between the normal and the maximum shear strains, is constant. However, in a general event, the loading may not be proportional and the strain biaxial ratio actually changes from time to time. The durability solver uses the linear least square method to determine the strain biaxial ratio rε using the following equation:

where is the time history of the maximum shear strain and is the time history of the corresponding normal strain.

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Strain biaxial ratio, Simcenter 3D 2021.1 Series

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