Journal Published Online: 04 March 2020
Volume 49, Issue 5

Effect of Defect Size and Load on the Performance of Thermoplastic Bearings

CODEN: JTEVAB

Abstract

The dynamic performance of thermoplastic bearing with respect to defect size, location, applied load, and speed was investigated in this article. A fatigue test rig was developed in house to test the thermoplastic bearing. The vibration signals are measured continuously using a piezoelectric accelerometer to investigate the influence of the size and location of the defects of both polypropylene (PP) and polyoxymethylene (POM) bearings. Vibration signatures of metallic bearings are investigated and compared with thermoplastic bearings. Test results reveal that POM bearings exhibit less vibration amplitude compared to that of PP and metal. Peak vibration amplitudes of shaft harmonics and Fast Fourier Transform increase with respect to the load levels and are more pronounced in inner race defects compared to outer race defects and are found to increase with the increase in defect size. A statistical indicator kurtosis shows the sensitivity to bearing damage by analyzing the vibration signals of the thermoplastic ball bearing. Thermoplastic bearing failure under high loads reveals wear and smearing as the important failure modes.

Author Information

Gaaliche, Nesrine
Unit of Mechanical Production Engineering and Materials, National School of Engineers of Sfax, Sfax, Tunisia Department of Mechanical Engineering, University of Bahrain, Sakheer, Kingdom of Bahrain
Chithambaram, Subramanian
Department of Mechanical Engineering, School of Engineering, Bahrain Polytechnic, Isa Town, Kingdom of Bahrain
Fathallah, Raouf
Unit of Mechanical Production Engineering and Materials, National School of Engineers of Sfax, Sfax, Tunisia National Engineering School of Sousse, University of Sousse, Sousse Erriadh, Tunisia
Pages: 23
Price: $25.00
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Details
Stock #: JTE20190766
ISSN: 0090-3973
DOI: 10.1520/JTE20190766