Fatigue Life Prediction of Spherical Gear Couplings

  1. Ibai Ulacia 1
  2. Jon Larrañaga 1
  3. Aitor Arana 1
  4. Aurea Iñurritegi 1
  5. Julen Elizegi 1
  1. 1 Universidad de Mondragón/Mondragon Unibertsitatea
    info

    Universidad de Mondragón/Mondragon Unibertsitatea

    Mondragón, España

    ROR https://ror.org/00wvqgd19

Revista:
Power Transmission Engineering

ISSN: 2331-2483

Any de publicació: 2019

Volum: 13

Número: 1

Pàgines: 48-53

Tipus: Article

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Altres publicacions en: Power Transmission Engineering

Resum

Classical coupling load models, still in use, assume a number of teeth in contact for a certain amount of misalignment.However, these models do not account for the tooth stiffness, applied torque or manufacturing errors, which producea sequential engagement of spline teeth. Therefore stressescould be overestimated and thus fatigue life predictions arerendered inaccurate. Recently, several studies have beenperformed in order to account for tooth stiffness and toothspacing errors of such couplings. However, they were onlyapplied in relatively small misalignments (approx. up to 1degree), compared with the case studied in this research (upto 7 degrees).In this work a numerical model has been developed inorder to predict the fatigue life of highly crowned spline coupling geometry. First, the number of teeth in contact hasbeen evaluated for different misalignment and torque conditions. Next, the fatigue life predictions have been calculatedbased on the numerically obtained stresses. Finally, fatiguetests have been performed in order to validate the developedmethodology. It is observed that the numerically estimatedcycles to fatigue failure are close to the experimentally measured fatigue life.

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Informació de finançament

The authors would like to acknowledge the Basque Government for the financial support through LEUNGOR project (ZL-2016/00534).

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