PARAMETRIC ANALYSIS OF NON-METALLIC HELICAL GEAR BY USING FEM

Mechanical Engineering

Gears are one of the most critical components in mechanical power transmission systems. The bending and surface strength of the gear tooth are considered to be one of the main contributors for the failure of the gear in a gear set. Thus, analysis of stresses has become popular as an area of research on gears to minimize or to reduce the failures and for optimal design of gears. This paper investigates the characteristics of an involute helical gear system mainly focused on bending and contact stresses using analytical and finite element analysis. Primary objective of this paper is to observe the effects of polymers which gives more benefits than the metallic gears like noise reduction, less vibration, lower maintenance, lower lubrication, low cost and easy to manufacture for the optimization. Static finite element analysis is required of both the materials. In this paper optimization method is presented for the comparison of metallic and non-metallic gear using static FEA. Helix angle, face width, pressure angle and module are important geometrical parameters in determining the state of stresses during the design of gears. Thus, in this work a parametric study is conducted by varying the helix angle, face width, pressure angle and module to study their effect on the bending stress of helical gear.

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