A steel rod 10mm in diameter and 1m long is heated from 20 to 100 degree celcius

Question

A steel rod 10mm in diameter and 1m long is heated from 20 to 100 degree celcius, E = 200 GPa and coefficient of thermal expansion is 12 x10⁻⁶ per degree celcius. Calculate the thermal stress developed?

Options:

A . 192 MPa(tensile)

B . 212 MPa(tensile)

C . 192 MPa(compressive)

D . 212 MPa(compressive)

Answer: Option C
Answer: (c).192 MPa(compressive)

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