Problem 12 Knowing that P = 5.2 kN, determine the factor of safety for the structure shown. Use E = 200 GPa and consider only buckling in the plane of the structure. F.S. = 1.5 P 70% B 22-mm diameter 1.2 m 18-mm diameter 1.2 m

Question 4: A machine of 540 kg is bolted at the middle of two parallel simply supported steel beams. The clear span of the beam is 2.4 m. The moment of inertia of the cross-section of each beam is I = 4.2×10¯6 mª. The Young's modulus of the steel is E 200 GPa. When the machine is operating, it will generate a vertical force P(t)=Posinot. When the machine runs at 300 rpm, Po= 1500 N. Neglect the weight of the beams and assume 2% viscous damping in the system. Determine the amplitude of steady-state deflection of the beams at their midpoint when the machine runs at 300 rpm. machine 1.2 m = 1.2 m Steel beams

Consider a point in a structural member that is subjected to plane stress. Normal and shear stresses acting on horizontal and vertical planes at the point are shown. Let T = 39 MPa and o = 19 MPa. Determine the center ocenter of the corresponding in- plane Mohr's circle. 50 MPa -21.56 MPa O -17.85 MPa O -10.87 MPa -14.07 MPa -15.50 MPa

2. From the given figure and data below. Determine the: a. P so that the structure is stable (in equilibrium) b. Draw the FBD of the member BC c. Reaction at A Weight of the member AB and BC = 50kg µ at C= 0.5 1.5 m 3m 1.5 m 30 30° 4, = 0.5