•4-69. Three bars each made of different materials are Steel Brass Copper connected together and placed between two walls when the temperature is T¡ = 12°C. Determine the force exerted on the (rigid) supports when the temperature becomes T2 = 18°C. The material properties and cross-sectional area of each bar are given in the figure. Ecu = 120 GPa 12(10-6)/°C apr = 21(10-")/°C au = 17(10-")/°C Acu= 515 mm² Est 200 GPa E = 100 GPa ast |Ag = 200 mm² Ap= 450 mm² 300 mm- 200 mm 100 mm

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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.