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MAXIMUM SHEAR STRESS ANALYSIS OF SPUR GEAR STRENGTH

Pages: 31 to 36

Salah Gasim Ahmed

Abstract:

Gears are commonly used for transmitting power between shafts, which imposes the need for higher endurance and reliability, this can be achieved only with the aid of clear and precise knowledge of the stresses on gear tooth during operation. This paper investigates the stresses at gear tooth at both tension and compression sides of the tooth. The analysis of the tooth strength in this paper is based on the maximum shear stress theory.  A new equation similar to Lewis’s equation was obtained but with a different form factor. The new derived equation is compared to the respective Lewis’s known equation. It was found that Lewis’s equation is not conservative as thought before. It is only as good as the new equation when applied to the tension side. But on the compression side it is not adequate.

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