paramagpy.metal.Metal.second_invariant_squared¶
- static Metal.second_invariant_squared(t)[source]¶
Calculate the second invariant squared of a tensor.
This is required for PRE calculations using the shilding tensor
- Parameters
tensor (3x3 matrix) – a second rank tensor
- Returns
secondInvariantSquared – the second invariant squared of the shift tensor
- Return type
float