a. A stainless-steel ring is 50 mm diameter and 2 mm thickness must be fitted into a steel shaft with 50.04 mm diameter. If the initial temperature is 20° C and the coefficient of linear expansion is...

Engineering science


Extracted text: a. A stainless-steel ring is 50 mm diameter and 2 mm thickness must be fitted into a steel shaft with 50.04 mm diameter. If the initial temperature is 20° C and the coefficient of linear expansion is 15x106 per degree C (17.3 x 106 per Kelvin). Work out the temperature, which is required to fit the ring on the shaft. Also calculate the stress and force induced to the ring if the young's modulus of steel is 205 GPa. b. Copper sheet covers a wall and has an area 20 m? at 15 ° C. Calculate the change in area when the environment temperature is increased up to 80° C. The coefficient of linear expansion for copper is 16.5 x 106 per Kelvin. c. An Aluminium bar welded to the bottom of a skillet weigh 1.5 kg. How much heat is needed to raise the temperature of aluminium bar from 25° C to 170°C, if the specific heat capacity of Al is 0.9 kJ/kg K.