HW#3 Read/Study: Chapter-3 Load and Stress Analysis o Curved beams in bending 3-18 (skip alternative calculation for e) o Contact stresses 3-19 o Summary 3-20 Chapter-4 Deflection and Stiffness o Spring rate 4-1 o Tension, compression, torsion 4-2 o Strain Energy 4-7 o Castigliano’s theorem 4-8 Problem #1 Given A disk made of class 30 grey cast iron (Table A-24). ID = 1 inch OD = 12 inches Thickness = 1 inch Shatters when tangential stress reaches Sut = 31000 psi. Find The rpm for which the disk tangential stress in the inner radius (r=0.5 inch) reaches the ultimate stress. Problem #2 Give A steel pulley hub press fitted on a solid steel shaft Shaft diameter = 50.025 mm Hub diameter = 50.000 mm Hub OD is = 100 mm Find a) Interface Pressure in MPa b) Tangential stress for the hub at r=25 mm in MPa c) Radial stress for the hub at r=25 mm in MPa Problem #3 – Create a professional-looking presentation for the solution (typed text, equations, graphics and graphs) – You can use MS Word and Excel, MathCad, or any other program that allows professional-looking presentations Given A steel hook with rectangular cross-section supporting 10000 lbs Inner radius = 2 inches Outer radius = 4 inches Thickness = 1 inch Find a) Maximum bending tensile stress in psi at the inner radius using curved beam formula b) A graph shown the bending stress as the inner radius changes from 2 inches to 20 inches. The outer radius is always 2 inches more than the inner radius. 1 inch 10000 lbs