Q/A shaft supported at the ends in ball bearings carries a straight tooth spur gear at its mid span and is to transmit 7.5 kW at 300 r.p.m. The pitch circle diameter of the gear is 150 mm. The distances between the centre line of bearings and gear are 100 mm each. If the shaft is made of steel and the allowable shear stress is 45 MPa, determine the diameter of the shaft. Show in a sketch how the gear will be mounted on the shaft; also indicate the ends where the bearings will be mounted? The pressure angle of the gear may be taken as 20°.

Q: Compute the torsional shear stress in a circular shaft with a diameter of 50 mm that is subjected to…

A: GivenT=800 Nmd=50mm=0.05 mFormulaσT=16Tπd3

Q: The figure below show a stepped shaft in torsion. Compute the maximum shear stress at the step when…

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Q: Problem 4

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Q: Determine the minimal value of a radius of the circular-solid shaft in problem 1 such that the…

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Q: an aluminum shaft is 6ft. and has toruq of 500 lb-ft. the shear stress is 6500 psi and the angle of…

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Q: The motor shown supplies 126 hp at 1340 rpm at A. Shafts (1) and (2) are each solid…

A: The power supplies by motor is The speed of motor is The diameter of shaft 1 and 2 is The modulus of…

Q: Problem 5

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Q: For the gear system shown in the figure, the diameter of shaft AB=12 mm. Determine the diameter of…

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Q: 3. A steel shaft 60 in. long has applied to it a 10,000 in-lb torque by a pulley located at the…

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Q: A solid 1.6 in. diameter shaft is used to synchronize multiple mechanisms in a manufacturing plant.…

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Q: Select the size of a hollow steel shaft necessary to transmit 150 hp at 250 rpm without exceeding an…

A: Given data,    Power=150hp    speed=250 rpm    shear stress=4.7ksi    angle  of twist =0.35°…

Q: 3. Knowing the rotation speed: n=300r/min and the power of applying on each wheel: P₁-200kW. P-50kW,…

A: Given Data: n=300 rpmP1=200 kWP2=50 kWP3=50 kWP4=100 kWτall=120 MPaLAB=LBC=LCD=1.5 mR=20 mm   To…

Q: The figure shows a shaft carrying three gears that rotates at 1150 rpm. Gear A delivers power =10kw…

A: Given, Gear A deliver 10KN Gear C deliver 15KN A shaft carrying 3 gears that rotates at 1150 rpm…

Q: The figure shows a shaft carrying three gears that rotates at 1150 rpm. Gear A delivers power to a…

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Q: a) Find the diameter of both shafts. b) If the modulus of rigidity of shaft (2) G is 77.2 GPa,…

A: for solution refer below images.

Q: The drive shaft AB of an automobile is made of a steel having an allowable shear stress of Tallow =…

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Combined Loading

Any functioning component, such as machine parts, structural members, pressure vessels, and so on, are all under the influence of more than one force. When anybody is under the influence of more than one force such as shear forces, bending moments, axial forces, torsion, and so on, then such body is said to be under combined loading. A very practical example of combined loading is the crankshaft of an internal combustion engine (IC engine). The crankshaft of the IC engine is under high rpm, which is caused due to the torsional forces. Due to the presence of piston, counterbalances, and internal imbalances, the crankshaft experiences lateral forces and due to the rise in temperature, the crankshaft undergoes thermal expansion, which pulls the crankshaft along the axial direction and lateral direction. The presence of unbalanced loads along the periphery of the crankshaft also induces a bending moment.