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calculate the maximum bending stress when the shaft is rotating at 80% of the critical speed

calculate the maximum bending stress when the shaft is rotating at 80% of the critical speed

Elements Of Electromagnetics
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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calculate the maximum bending stress when the shaft is rotating at 80% of the critical speed

A borehole drilling machine with a vertical shaft of 60 mm diameter is 500 mm long and is supported in long bearings at its top end. The shaft has Young's modulus of E 110 GN/m?. A disc of mass 40 kg is attached to the center of the shaft. The center of the disc is 0.25 mm from the geometric axis of the shaft. Neglecting any increase in stiffness due to the attachment of the disc to the shaft, calculate:
Transcribed Image Text:A borehole drilling machine with a vertical shaft of 60 mm diameter is 500 mm long and is supported in long bearings at its top end. The shaft has Young's modulus of E 110 GN/m?. A disc of mass 40 kg is attached to the center of the shaft. The center of the disc is 0.25 mm from the geometric axis of the shaft. Neglecting any increase in stiffness due to the attachment of the disc to the shaft, calculate:
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