Example 5.15. An overhang crank with pin and shaft is shown in Fig. 5.18. A tangential load of 15 kN acts on the crank pin. Determine the maximum principal stress and the maximum shear stress at the centre of the crankshaft bearing. Crank pin- 15 kN W 140 mm Crank web Crank shaft -120 mm- Fig. 5.18 80 mm

Example 5.15. An overhang crank with pin and shaft is shown in Fig. 5.18. A tangential load of 15 kN acts on the crank pin. Determine the maximum principal stress and the maximum shear stress at the centre of the crankshaft bearing. Crank pin- 15 kN W 140 mm Crank web Crank shaft -120 mm- Fig. 5.18 80 mm

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.

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Example 5.15. An overhang crank with pin and shaft is shown in Fig. 5.18. A tangential load
of 15 kN acts on the crank pin. Determine the maximum principal stress and the maximum shear
stress at the centre of the crankshaft bearing.
Crank pin-
15 kN W
140 mm
Crank web
Crank shaft
-120 mm-
Fig. 5.18
80 mm

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Step 1: Given data

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Step 2: Calculation of the torque and moment acting on the crank shaft bearing

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Step 3: Calculation of the bending stress acting on the crank shaft bearing

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Step 4: Calculation of the shear stress acting on the crank shaft bearing

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Step 5: Calculate maxi. principal stress and the maximum shear stress at the crankshaft bearing

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