A compound bar consisting of bronze, aluminum, and steel segments is loaded axially as shown in the figure. The cross-sectional area of the bronze, aluminum, and steel are 404 mm2, 642 mm2 , and 271 mm2 respectively.Determine the change in length (in mm) of the bar if P = 28943 N.The moduli of elasticity are 80.75 GPa for bronze ,73.14 GPafor aluminum , and 203.66 GPa for steel . Round off the final answer to four decimal places.

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Material Properties

Construction in civil engineering demands high strength, durability, and longevity. These targets can be achieved by better design and analysis, along with the correct choice of materials. Different materials have different properties and hence, they respond and performs differently under the various condition of external loadings. It is therefore a critical task of an engineer to select the right material based on the property that the material is supposed to function in real-time. When speaking about the property, there are different categories of material properties like chemical property, physical property, mechanical property, electrical property, magnetic property, thermal property, etc. These material properties form the basis of material selection in various applications.