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- P = 244.8 kips Max sheering stress occurs at 45 deegreesDesign a key to transmite 40 kw power by a shaft of 50 mm diameter which rotates 1200 r.p.m , if the permissible shear and crushing stresses are 35 N/mm and 65 N/mm respectively, take the key length 30 mm.A wood-stave pipe is bound by steel rods which take the untire bursting stress. Find the proper spacing for 8-mm diameter steel rod for a 1.80-m diameter wood stave pipe if the working stress is 60 mpa for a head of water of 20m.
- Find maximun normal stress note 10in,15in,20in diameterFind normal stress at a,b,c,d (t wall = 10mm)Problem :Pressure vessel made of alloy steel with Yield Strength of 250 MPa, Pressure acting on Pressure Vessel = 10 Atmosphere. Longitudinal Stress (σL) = 200 MPa. Hoop Stress (σθ) = 150 MPa. Radial Stress (σR) = -50. Question :a) How thick is the pressure vessel if the Inner Diameter is D = 2 Meters? b) Check whether the pressure vessel is safe or not? c) Calculate the maximum shear stress with Mohr's circle? d) Check whether the pressure vessel is safe or not with Tresca yield criterion and compare it with von Mises yield criterion?
- A thick cylinder internal diameter 240mm external diameter 240mminternal diameter ‘D’ is subject to external pressure of 40MPa. Determine the diameter‘D’ if the minimum hoop stress in the cylinder is not to exceed 200MPa in mm.Show whether it is safe by calculating the stresses at point A according to the Tresca Criteria. (Diameter: 20 mm, σA = 320 MPa)An electric power transmission pole is 12 m above ground level and embedded 2 m into the ground. The butt diameter is 450 mm and the tip diameter (the top of the pole) is 320 mm. The weight of the pole, cross arms, and wires is 33 kN. Assuming the pole transmits the load as a point load, find the change in vertical stress in kPa at 1m depth.
- A circular hollow shaft of outer diameter 200mm and inner diameter 160mm is subjected simultaneously to a torque T= 11kN and axial compressive load, P = 362kN . Calculate the maximum and minimum principal stresses and maximum shear stress t maxA hollow shaft has to transmit 6 MW at 150 rev/min. The maximum allowable stress is not to exceed 60 MN/m² nor the angle of twist 0.3 per metre length of shafting. If the outside diameter of the shaft is 300 mm find the minimum thickness of the hollow shaft to satisfy the above conditions. G = 80 GN/m².A mild steel shaft transmits P is 18 kW at N is 525 r.p.m. It carries a central load of 900 N and is simply supported between the bearings 2.5 metres apart. Determine the size of the shaft, if the allowable shear stress is 42 MPa and the maximum tensile or compressive stress is not to exceed 56 MPa.