The compound bar carries the axial forces P and 2P. Find the maximum allowable value of P if the working stresses are 240 MPa for steel and 120 MPa for aluminum, and the total elongation of the bar is not to exceed 6 mm. 1.5 m 2 m 2P Steel Aluminum A = 12 mm2 A = 18 mm2 E = 70 GPa E = 200 GPa

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Loads and Reactive Forces

Loads are the external influences that a beam experiences under its working conditions. For instance, a beam may be subjected to shear loads, twisting loads, bending moment, and axial loads during its working conditions. Engineers primarily deal with beams and trusses in the civil engineering domain. Due to the influence of loads, it is very crucial to determine the induced stresses and deformation values. These values give an insight into the critical area of the beam that needs to be worked upon to make it fail-safe.