given: - initial length of steel tube= 200mm - aluminum rod is 0.175 mm shorter than steel tube. - l=0.175 mm properties of materials - ALUMINUM: coefficient of linear expansion: 23x10 -6 /C modulus...

given:

- initial length of steel tube= 200mm

- aluminum rod is 0.175 mm shorter than steel tube.

- l=0.175 mm

properties of materials

    - ALUMINUM:

             coefficient of linear expansion: 23x10^-6
/C

             modulus of elasticitty= 70 GPa

    - STEEL

            Coeficient of linear expansion: 11x10^-6
/C

            Modulus of elasticity: 200 GPa

*NEGLECT SHEAR AND LATERAL DEFORMATIONS.

REQUIRED:

- which of the two members will have contact on the rigid switch first and at what temperature

- axial stress that would develop on 1st member after the 2nd material fills in the gap safely.

PLS. SHOW FULL SOLUTIONS WITH BRIEF EXPLANATIONS AND NECESSARY DIAGRAMS...