A metal component of initial length 600 mm undergoes an increase in length of 0.05 mm when loaded at a temperature of 18 °C.
Determine, (a) the tensile stress in the component when fi rst loaded, (b) the temperature at which the stress will be zero if the component is rigidly held at its extended length. Take E = 120 GPa and x = 15 x 10-6 °C-1 for the component material.