PSI - Issue 12

Andrea Mura et al. / Procedia Structural Integrity 12 (2018) 52–57 Mura et Al. / Structural Integrity Procedia 00 (2018) 000 – 000

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This difference can be justified as the theoretical model does not take into account the teeth deflections, but considers the teeth as rigid body. Moreover, numerical simulations highlights that tilting moment has a non-linear relation with the transmitted torque due to the tooth deflection. On the other hand, the theoretical model gives results that are proportional to the transmitted torque.

5. Conclusions

In this work, the overload moment caused by spline coupling misalignment has been investigated by numerical simulation and a theoretical model. Results show that misalignment moments are caused by a non-uniform load distribution among engaging teeth due to the misalignment itself. The tilting moment phenomena is non- linear respect to the transmitted torque, this is due to tooth deflection. The theoretical model considered in this work does not take into consideration teeth elasticity, therefore the results can be considered just as a preliminary value to be verified by numerical simulations. Future work should be performed to investigate different spline coupling mounting configurations and the effect of teeth microgeometry: effect of different values of crowning radius and the effect of barreling. Alfares M.A., Falah A.H., Elkholy A.H., Clearance distribution of misaligned gear coupling teeth considering crowning and geometry variations, Mechanism and Machine Theory 41 1258 – 1272 (2006). Barrot A., Paredes M., and Sartor M., Determining both radial pressure distribution and torsional stiffness of involute spline couplings, Proceedings of the Institution of Mechanical Engineers, Part. C, Journal of Mechanical Engineering Science, December 1, 220, 12, 1727-1738 (2006). Cuffaro V., Curà F., Mura A., Test Rig for Spline Couplings Working in Misaligned Conditions, Journal of Tribology 136(1), (2014), doi:10.1115/1.4025656. Curà F., Mura A., Experimental procedure for the evaluation of tooth stiffness in spline coupling including angular misalignment, Mechanical Systems and Signal Processing 40, 545 – 555, (2013) DOI: 10.1016/j.ymssp.2013.06.033. Curà F., Mura A., Experimental and theoretical investigation about reaction moments in misaligned splined couplings, Mechanical Systems and Signal Processing, 45, pp. 504 – 512 (2014). Curà F., Mura A., Gravina M., Load distribution in spline coupling teeth with parallel offset misalignment, ProcIMechE Part C: J Mechanical Engineering Science Vol. 227 Issue 10 pp. 2193 – 2203, DOI:10.1177/0954406212471916 (2013). Curà F., Mura A., Theoretical and numerical evaluation of tilting moment in crowned teeth splined couplings, Meccanica, Meccanica (2018) 53 (1) pp. 413 – 424. Elkholy A. H., Alfares M. A., Misalignment loads in splined gear coupling, International journal of computer applications in technology, Volume 15, Nos. 1/2/3, 128-137 (2002). Guo Y., Lambert S., Wallen R., Errichello R., Keller J., Theoretical and experimental study on gear-coupling contact and loads considering misalignment, torque, and friction influences, Mechanism and Machine Theory 98, 242 – 262 (2016). Leen S. B., Hyde T. R., Williams E. J., Becker A. A., McColl R., Hyde T. H. and Taylor J. W., Development of a representative test specimen for frictional contact in spline joint couplings, The Journal of Strain Analysis for Engineering Design January 1, 35, 521-544 (2000). Margineanu D., Margineanu E., Zabava E.S., Farta A.M., Analytic and experimental study of the load distribution on spline joints length considering the contact rigidity of the bearing surfaces, Applied Mechanics and Materials, Trans Tech Publications, Switzerland 162, 74-83 (2012). Medina S, Olver A V, An analysis of misaligned spline couplings, ProcInstnMechEngrs Vol 216 Part J: J Engineering Tribology - IMechE, 269 279 (2002). Tjernberg A., Load distribution and pitch errors in a spline coupling, Materials and Design 22, 259-266 (2001). Tjernberg A., Load distribution in the axial direction in a spline coupling, Engineering Failure Analysis 8, 557-570 (2001). References