II.1.10.11 Tsai-Hill criterion (version c)

This criterion is very similar to the one described in section II.1.10.9. The criterion has a failure index calculated as follows:

The criterion differs from the previous one by the fact that the allowable ${\sigma }_{11}^{\prime \text{all}}$ is used in the calculation. This allowable is set to ${\sigma }_{11}^{\text{t,all}}$ or ${\sigma }_{11}^{\text{c,all}}$ depending on the sign of ${\sigma }_{11}{\sigma }_{22}$.

The calculation of reserve factor is as for the more classical Tsai-Hill criterion (II.1.119) and (II.1.120). This criterion is referred to as “TsaiHill_c” criterion in FeResPost.