Abstract

TACLE-HUMANANTE, Paul Marcelo; MOYA-RODRIGUEZ, Jorge Laureano  and  MARTY-DELGADO, José Roberto. The Robustness index as a parameter to evaluate the behavior of spur gears transmissions. Ingeniería Mecánica [online]. 2019, vol.22, n.1, pp. 57-66. ISSN 1815-5944.

In the present paper, a new concept called the robustness index was introduced to evaluate the fracture strength of spur gears with asymmetric teeth, and it was analyzed how the corrections and the tooth asymmetry influence this index. To do this, a virtual design of experiment was carried out with two input factors and five levels of experimentation and the Finite Element Method was used, varying the coefficient of asymmetry of the tooth between 1 and 1.35 and the correction coefficient between zero and 1.25. In this way, the bending stresses in the teeth without and with modifications were calculated, evaluating therefore the robustness index to bending stresses. It was concluded that combining asymmetry and correction the bending strength can be increased by 48 %.

Keywords : spur gears; robustness; stresses.

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