const MaterialProperty< RankTwoTensor > & _F
Deformation gradient.
Native interface for providing the 1st Piola Kirchhoff stress.
virtual ~ComputeLagrangianStressPK1()
static InputParameters validParams()
virtual void computeQpCauchyStress()
Wrap the PK stress to get the Cauchy stress.
Provide stresses in the form required for the Lagrangian kernels.
ComputeLagrangianStressPK1(const InputParameters ¶meters)
virtual void computeQpStressUpdate() override
Calculate the stress update to provide both measures (cauchy and pk1)
virtual void computeQpPK1Stress()=0
Provide for the actual PK stress update (just PK1)
const InputParameters & parameters() const
const MaterialProperty< RankTwoTensor > & _inv_df
Inverse incremental deformation gradient.