• A prismatic beam of trapezoidal section shown in figure is subjected to sagging B.M Calculate the ratio of bi to b₂ for maximum economy if the allowable stresses in tension and compression are 40 N/mm2 and 50 N/mm² respectively. k b₁ Ĵ n d d-n b₂ A

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The 200-mm square aluminum block supports a compressive load of 300 kN. What is the normal stress acting on section a–a in MPa What is the shearing stress acting on section a–a in MPa  The lapbelt assembly is to be subjected to a force of 800 N. What is the required thickness t  in mm. of the belt if the allowable  tensile stress  for the material is 10 MPa?

A Sandwich block is comprised of brass in the centre with two aluminium plates attached to either side. The block is fastened by a top rigid end plate. An axial load (P = 443 kN) is applied to the centre of the block as shown below. Find the normal stress in the brass and the normal stress in the aluminium cover plates. Aluminum plates (E = 70 GPa) 300 mm Brass core (E = 105 GPa) 10 mm 40 mm 10 mm P Rigid end plate 60 mm OneDrive Screenshot saved The screenshot was added to your

The composite shaft consists of a copper rod that fits loosely inside an aluminum sleeve. The two  components are attached to a rigid wall at one end and joined with an end-plate at the other end. Determine the maximum shear stress in each material when the 2-kN m torque is applied to the end-plate. Use G = 26 GPa for aluminum and G =47 GPa for copper.

Problem 1 A rigid bar AC is loaded and supported as shown. Bar AB and CD are unstressed before the load is applied. Bar AB is made of steel (E = 30000ksi) and has a cross-sectional area of 1.25 in?. Bar CD is made of brass (E = 15000ksi) and has a cross-sectional area of 0.75 in². Determine: %3D 12 k/ft (1) The stresses in bars AB and CD (2) The vertical displacement (deflection) of C relative to the displacement at point (Note: express your answer in inches and include a direction) TI!||! 3 ft 4.5 ft

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