A steel rod 10 mm in diameter and Im long is heated from 20°C to 120°C, E = 200 GPa and a = 12 x 10-6 per °C. If the rod is not free to expand, the thermal stress developed is: (a) 120 MPa (tensile) (c) 120 MPa (compressive) (b) 240 MPa (tensile) (d) 240 MPa (compressive)

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Thermal Properties of Materials

In mechanical engineering, the thermal property is represented as the physical quantity that is relevant to the application of heat. The thermal properties are evaluated by variations in any specific material due to low heat or high heat. The quantities that influence the thermal property of the materials are mass, density, temperature, and many others.