Q2 (a) As shown in Figure Q2(a), a 700 mm long, 18 mm diameter rod made of a homogeneous, isotropic material is observed

[answerhappygod]

Q2 A As Shown In Figure Q2 A A 700 Mm Long 18 Mm Diameter Rod Made Of A Homogeneous Isotropic Material Is Observed 1 (107.57 KiB) Viewed 32 times

Q2 (a) As shown in Figure Q2(a), a 700 mm long, 18 mm diameter rod made of a homogeneous, isotropic material is observed to increase in length by 500 µm, and to decrease in diameter by 3.2 µm when subjected to an axial 18 kN load. Determine the modulus of elasticity and Poisson's ratio of the material. (5 marks) (b) As shown in Figure Q2(b), a concrete floor slab is reinforced by 16 mm diameter steel rods placed 38 mm above the lower face of the slab and spaced 150 mm on centres. The modulus of elasticities are 25 GPa and 200 GPa for concrete and steel, respectively. Knowing that a bending moment of 4.5 kNm is applied to each 0.3 m width of the slab, determine: (1) (c) The maximum stress in the concrete. (1) The stress in the steel. (5 marks) The thin-walled extruded beam shown in Figure Q2(c) is made of aluminium and has a uniform 3 mm wall thickness. Knowing that the shear in the beam is 5 kN, determine: The shearing stress at point A. The maximum shearing stress in the beam. 60mm -500pm 25mm ARAN 25mm FIGURE Q2(c) 5KN 100 mm 150 mm 150mm somm FIGURE (20) (5 marks) (5 marks) (5 marks) 150mm