Question 3(a) A compound gear train consists of 7 gears (1– 7) in total with the number of teeth given inthe table below. Gears 2 and 3 and gears 5 and 6 are a compound gear set. Gear 1 rotates in aclockwise direction.N1 = 45, N2 = 30, N3 = 60, N4 = 20, Ns = 45, N6 = 54, N7= 25i. Briefly sketch and label the gear train. Note a 2D sketch is sufficient and the diametersof the gears are not required at this stage so use your own judgement on sizing but clearlystate any assumptions.ii. Determine the Velocity Ratio and Train Value of the gear Train.iii. If the input speed is 200rev/mins determine the output speed and direction.iv. Determine the speed of gear 4.(b) A 1m long rectangular beam supported at either end is subjected to a 5kN point load in thecentre. Determine the maximum bending and maximum shear stress if the beam is 20mm thickand 200mm wide.

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Answered: (b) A 1m long rectangular beam…

(b) A 1m long rectangular beam supported at either end is subjected to a 5kN point load in the centre. Determine the maximum bending and maximum shear stress if the beam is 20mm thick and 200mm wide.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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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.

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