9-15. The steel bar has the original dimensions shown in the figure. If it is subjected to an axial load of 50 kN. determine the change in its length and its new cross-sectional dimensions at section aa. E-200 GPa,-029. 50 AN SOLN -20 mm mm s50 mm 50 mm 50 kN 200 mm

The copper bar is subjected to a uniform loading shown in Fig. 10–24. Ifit has a length a = 300 mm, width b = 50 mm, and thickness t = 20 mmbefore the load is applied, determine its new length, width, and thicknessafter application of the load. Take Ecu = 120 GPa, ncu = 0.34.

1,200 N-m 4,500 N-m 2,800 N-m 500 N-m (3) 0.70 m 1.80 m 0.70 m Complete the torsion diagram of rod ABCD loaded as shown by dragging the components and filling in the values. T (kNm) A D B 1700 4500 500 -1700 -1200 2800 1600 -2300 -4500 4000 2300 3300 -2800 -3300 1200 -500 -4000 -1600

The assembly consists of three disks A, B, and C that are used to support the load of 140 kN. Determine the smallest diameter d₁ of the top disk, and the largest diameter d₂ of the opening, and the largest diameter d3 of the hole in the bottom disk. The allowable bearing stress for the material is (b) allow = 350 MPa and the allowable shear stress is Tallow=125 MPa. C B d₁ -| A 140 kN 20 mm 10 mm d3 d2