Ultimate Ultimate strength (MPa) strength (ksi) Material Aluminum alloys 100–550 Concrete 10-70 (compression) Steel Machine 550-860 Spring 700-1,900 Stainless 400–1,000 Tool 900 Structural Steel 340-830 Titanium alloys 900–1,200 Wood (Bending) Douglas fir 50-80 Oak 50–100 Southern pine 50–100

The stress in a steel bar is given as 25,0000 kN/m² and length of the bar is 50 m. Calculate the shortening of the bar if E = 2.14 × 108 N/mm²

2. A cube made of an alloy with dimensions of 50mmx50mm×50mm is placed into a pressure chamber and subjected to a pressure of 80 MPa. If the modulus of elasticity of the alloy is 200 GPa and Poisson's ratio is 0.30, what will be the length of each side of the cube, assuming that the material remains within the elastic region?

The assembly shown in the figure consists of an aluminum tube AB and a steel rod BC. The rod is attached to the tube through the rigid collar at B and passes through the tube. The cross-sectional area of the rod is 75 mm2 and the cross-sectional area of the tube is 400 + UV in mm2, where UV is 99. A tensile load of 80 kN is applied to the rod. Take Est = 200 GPa for the steel rod, Eal = 70 GPa for the aluminum tube. Determine: (a) the displacement of end C with respect to end B (i.e., the elongation of the steel rod), (b) the displacement of end B with respect to the fixed end A (i.e., the shrink of the aluminum tube), (c) the displacement of the end C of the rod (i.e., (a) + (b)).