Abstract
In part I of this paper a program was developed using the ANSYS Parametric Design Language (APDL) to generate 1, 3, and 5 tooth segment finite element models of a large low addendum spur gear. The finite element models are constrained on radial sides in the rim portion and the inside rim surface is left unconstrained. An appropriate load is applied at the highest point of single tooth contact (HPSTC) for the 2-D finite element models and the entire load is applied on a line of nodes located along the face width in the 3-D finite element models. The two and three dimensional models of 1, 3 and 5 tooth segments are analyzed by varying β, which is the ratio of rim thickness to total tooth height. The effect of web on bending and equivalent stresses is also studied in the 3-D models. The maximum equivalent stresses and maximum bending stresses obtained for different values of β in two dimensional and three dimensional models are compared. Three dimensional models with and without constraints at rim-web interface are also compared in 1, 3 and 5 tooth segments. Based on these results and comparisons an appropriate rim thickness is suggested and importance of web is discussed.
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