cratepy.ioput.miscoutputfiles.voxelsoutput.cauchy_from_first_piola¶
- cauchy_from_first_piola(def_gradient, first_piola_stress)[source]¶
Cauchy stress tensor from first Piola-Kirchhoff stress tensor.
where
is the Cauchy stress tensor, is the deformation gradient, and is the first Piola-Kirchhoff stress tensor.
- Parameters:
def_gradient (numpy.ndarray (2d)) – Deformation gradient.
first_piola_stress (numpy.ndarray (2d)) – First Piola-Kirchhoff stress tensor.
- Returns:
cauchy_stress – Cauchy stress tensor.
- Return type:
numpy.ndarray (2d)