Stress in copper & steel bar

Q.  If a composite bar of copper and steel is heated at 120o C, the stress induced in copper bar is _______
- Published on 21 Sep 15

a. compressive stress
b. shear stress
c. tensile stress
d. thermal stress

ANSWER: compressive stress

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    Discussion

  • Sravanthi   -Posted on 24 Nov 15
    - Steel has less coefficient of thermal expansion than copper, due to this copper expands more than steel.

    - Equilibrium condition can be maintained when copper is compressed and steel is elongated or pulled.

    - Hence, the type of stress induced in copper bar is compressive as it is compressed and stress induced in steel bar is tensile as it needs to be elongated.

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