Which of the following assumptions is NOT used in basic theory of plasticity? the material is isotropic there is no Bauschinger effect the yield stress depends on hydrostatic pressure the material response is independent of the rate of loading the material is incompressible in the plastic range QUESTION 2 Stress tensor defined as the fictitious force in the undeformed configuration per unit area in the undeformed configuration is O The Left Cauchy-Green Deformation Tensor Cauchy Stress Tensor The Right Cauchy-Green Deformation Tensor The Second Piola-Kirchhoff Stress Tensor The First Piola-Kirchhoff Stress Tensor