A material’s response to an applied force changes with temperature and pressure. In metals, the shear modulus decreases with increasing temperature. So, the rigidity decreases as pressure increases.
Mechanical Threshold Stress (MTS) plastic flow stress model, the Nadal and LePoac (NP) shear modulus model, and the Steinberg-Cochran-Guinan (SCG) shear modulus model are the three models used to predict how pressure and temperature affect shear modulus. It is observed that in metals, there is an area of temperature and pressure where there is a linear change in the shear modulus. Modelling the behaviour outside of this range though is trickier.
Leave a Reply