Abstract

This paper presents a study on the deflection and root stress of WN (SymMarC) gear tooth. The tooth deflection and root stress of a SymMarC gear tooth due to a concentrated load were calculated by the three-dimensional finite element method (FEM) and compared with those measure. The validity of the gear model and constraint condition used in this FEM analysis was confirmed, and the critical section of the SymMarC gear tooth and the effects of the number of teeth and the face width on the tooth deflection and root stress were clarified. Furthermore, on the basis of these results, the approximate equations for the deflection and bending moment due to a concentrated load on a SymMarC gear tooth were derived.

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