A hole of diameter d = 4 cm is drilled in a steel plate of diameter D = 10 cm. The torque applied to the driver is M = 40 Nm. Thread pitch h = 0.5 mm. Find the increase in plate temperature dt if 60% of the expended energy is converted into internal energy of the plate. The specific heat capacity of steel is c = 0.46 kJ/(kg K), its density is p = 7.8 103 kg/m3.

Detailed solution. Format gif