Theory Manual Version 3.4
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Subsubsection 5.6.5.6: Maximum Shear Stress Up Subsection 5.6.5: Constitutive Models Subsubsection 5.6.5.8: Octahedral Lagrange Strain

#### 5.6.5.7 Maximum Normal Lagrange Strain

The Lagrange strain tensor is related to via Eq.(5.6.3-2). Its maximum principal value is denoted by . For this criterion, we let Then, the damage surface normal is given by where is a unit vector along the principal direction of normal strain.
Subsubsection 5.6.5.6: Maximum Shear Stress Up Subsection 5.6.5: Constitutive Models Subsubsection 5.6.5.8: Octahedral Lagrange Strain