3. (a) (b) (c) A hollow steel driving shaft has the modulus of rigidity is 80 GN/m² and its Young's modulus has the same value as modulus of rigidity. is 3:2 and the length of the shaft is 6m. The ratio of the outside to inside diameter This shaft is designed to transmit 750 kW at the rotational speed of 100 rpm but must satisfy the following two conditions: i) the twist must not exceed 1°; ii) the shear stress must not exceed 36 N/mm². Determine the shaft diameter under condition i) Determine the shaft diameter under condition ii) & the final decision of diameter to meet both conditions Determine the direct stress within the shaft if the shaft experiences a change of temperature from 20°C to 80°C and thermal coefficient of the shaft is 12x106/°C

3. (a) (b) (c) A hollow steel driving shaft has the modulus of rigidity is 80 GN/m² and its Young's modulus has the same value as modulus of rigidity. is 3:2 and the length of the shaft is 6m. The ratio of the outside to inside diameter This shaft is designed to transmit 750 kW at the rotational speed of 100 rpm but must satisfy the following two conditions: i) the twist must not exceed 1°; ii) the shear stress must not exceed 36 N/mm². Determine the shaft diameter under condition i) Determine the shaft diameter under condition ii) & the final decision of diameter to meet both conditions Determine the direct stress within the shaft if the shaft experiences a change of temperature from 20°C to 80°C and thermal coefficient of the shaft is 12x106/°C

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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Concept explainers

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.

Question

3.
(a)
(b)
(c)
A hollow steel driving shaft has the modulus of rigidity is 80
OGN/m² and its Young's modulus has the same value as
modulus of rigidity. The ratio of the outside to inside diameter
is 3:2 and the length of the shaft is 6m.
This shaft is designed to transmit 750 kW at the rotational
speed of 100 rpm but must satisfy the following two
conditions: i) the twist must not exceed 1°; ii) the shear stress
must not exceed 36 N/mm².
Determine the shaft diameter under condition i)
01
6
Determine the shaft diameter under condition ii) & the final
decision of diameter to meet both conditions
fo
Determine the direct stress within the shaft if the shaft
experiences a change of temperature from 20°C to 80°C and
thermal coefficient of the shaft is 12x10-6/°C

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