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Q7.  A solid steel bar 125 mm in diameter is encased in copper linear that is 10 mm thick. The component supports a compressive axial load of 250 kN evenly distributed over the full cross-sectional area. Calculate the final stress in the steel bar and copper linear if the temperature of the compound component is evenly increased by 120^oC. (16)

Note:

Modulus of Elasticity for steel = 206 GN/m²

Modulus of Elasticity for copper = 125 GN/m²

Coefficient of linear expansion for steel = 11×10^-6m/deg.C

Coefficient of linear expansion for copper = 17×10^-6m/deg.C