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The Use of Boundary Elements For The Determination of the AGMA Geometry Factor - January/February 1988

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Archive > 1988 > January/February 1988 > The Use of Boundary Elements For The Determination of the AGMA Geometry Factor

The article "The Use of Boundary Elements For The Determination of the AGMA Geometry Factor" appeared in the January/February 1988 issue of Gear Technology.

Summary
The geometry factor, which is a fundamental part of the AGMA strength rating of gears, is currently computed using the Lewis parabola which allows computation of the Lewis form factor.(1) The geometry factor is obtained from this Lewis factor and load sharing ratio. This method, which originally required graphical construction methods and more recently has been computerized, works reasonably well for external gears with thick rims.(2-6) However, when thin rims are encountered or when evaluating the strength of internal gears, the AGMA method cannot be used.

Keywords
geometry factor, strength rating, FEA, design, thin-rimmed gears, internal gears

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