The stress–strain diagram for a particular stainless steel alloy is shown in Figure P3.14. A rod made from this material is initially 800 mm long at a temperature of 20°C. After a tension force is...

The stress–strain diagram for a particular stainless steel alloy is shown in Figure P3.14. A rod made from this material is initially 800 mm long at a temperature of 20°C. After a tension force is applied to the rod and the temperature is increased by 200°C, the length of the rod is 804 mm. Determine the stress in the rod and state whether the elongation in the rod is elastic or inelastic. Assume the coefficient of thermal expansion for this material is
.