Before revision: Shear modulus models that have been used in plastic flow computations include: the MTS shear modulus model developed by and used in conjunction with the Mechanical Threshold Stress (MTS) plastic flow stress model.
After revision: Shear modulus models that have been used in plastic flow computations include: the Varshni-Chen-Gray model developed by and used in conjunction with the Mechanical Threshold Stress (MTS) plastic flow stress model.