Spur gear stress analysis results are presented for a variety of loading conditions, support conditions, fillet radii, and rim thickness. These results are obtained using the SAP IV finite-element code. The maximum stresses, occurring at the root surface, substantially increase with decreasing rim thickness for partially supported rims (that is, with loose-fitting hubs). For fully supported rims (that is, with tight-fitting hubs), the root surface stresses slightly decrease with decreasing rim thickness. The fillet radius is found to have a significant effect upon the maximum stresses at the root surface. These stresses increase with decreasing fillet radius. The fillet radius has little effect upon the internal root section stresses.
A Finite Element Stress Analysis of Spur Gears Including Fillet Radii and Rim Thickness Effects
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Chang, S. H., Huston, R. L., and Coy, J. J. (September 1, 1983). "A Finite Element Stress Analysis of Spur Gears Including Fillet Radii and Rim Thickness Effects." ASME. J. Mech., Trans., and Automation. September 1983; 105(3): 327–330. https://doi.org/10.1115/1.3267364
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