ENG  Vol.8 No.9 , September 2016
On the Bump Tests of Cracked Shafts Using Acoustic Emission Techniques
Abstract: An investigation about the application of Acoustic Emission (AE) techniques to analyze the dynamic response of different cracked shafts rendered in bump tests is presented in this work. The experimental apparatus devised for this work complies of six shafts with different transverse crack sizes and a high-frequency data acquisition system. The AE signals generated in the bump tests performed on the different cracked shafts are captured by a wideband AE transducer. Those signals are treated by using statistical moments, wavelet transforms, and frequency- and time-domain procedures. A transverse crack of predetermined depth is etched into each shaft. The experimental results show that the values of kurtosis and skewness estimated for the AE signals can be used to identify the crack size.
Cite this paper: Pimentel-Junior, G. , Oliveira, F. and Faria, M. (2016) On the Bump Tests of Cracked Shafts Using Acoustic Emission Techniques. Engineering, 8, 572-581. doi: 10.4236/eng.2016.89053.

[1]   Elforjani, M. and Mba, D. (2009) Detecting Natural Crack Initiation and Growth in Slow Speed Shafts with the Acoustic Emission technology. Engineering Failure Analysis, 16, 2121-2129.

[2]   Elforjani, M. and Mba, D. (2011) Condition Monitoring of Slow-Speed Shafts and Bearings with Acoustic Emission. Strain, 47, 350-363.

[3]   Kurz, J.H. (2004) Signal Conditioning of Acoustic Emissions and Ultrasound Signals. Otto-Graf-Journal, 15, 59-75.

[4]   Niknam, S.A., Thomas, T., Hines, J.W. and Sawhney, R. (2013) Analysis of Acoustic Emission Data for Bearings subject to Unbalance. International Journal of Prognostics and Health Management, 4, 80-89.

[5]   Mirhadizadeh, S.A., Moncholi, E.P. and Mba, D. (2010) Influence of Operational Variables in a Hydrodynamic Bearing on the Generation of Acoustic Emission. Tribology International, 43, 1760-1767.

[6]   Rahmam, M.D.Z., Ohba, H., Yamamoto, T. and Yoshioca, T. (2008) A Study on Incipient Damage Monitoring in Rolling Contact Fatigue Process Using Acoustic Emission. STLE Tribology Transactions, 51, 543-551.

[7]   Elforjani, M. and Mba, D. (2010) Accelerated Natural Fault Diagnosis in Slow Speed Bearings with Acoustic Emission. Engineering Fracture Mechanics, 77, 112-127.

[8]   Choudhury, A. and Tandon, N. (2000) Application of Acoustic Emission Technique for the Detection of Defects in Rolling Element Bearings. Tribology International, 33, 39-45.

[9]   Al-Ghamda, A.M. and Mba, D. (2004) A Comparative Experimental Study on the Use of Acoustic Emission and Vibration Analysis for Bearing Defect Identification and Estimation of Defect Size. Mechanical Systems and Signal Processing, 20, 1537-1571.

[10]   Vance, J.M. (1988) Rotordynamics of Turbomachinery. John Wiley & Sons, New York.

[11]   Ovacikli, A.K., Pääjärvi, P., LeBlanc, J.P. and Carlson, J.E. (2014) Uncovering Harmonic Content via Skewnes Maximization—A Fourier Analysis. Proceedings of the 22nd European Signal Processing Conference (EUSIPCO), Lisbon, 1-5 September 2014, 481-485.

[12]   Pääjärvi, P. and LeBlanc, J.P. (2010) Fault-Impact Enhancement Using Aadaptive Filtering for Condition Monitoring of Ball Bearings. Proceedings of the 7th International Conference on Condition Monitoring and Machinery Failure Prevention Technologies, Stratford-upon-Avon, 22-24 June 2010, 1-8.

[13]   Durkhure, P. and Lodwal, A. (2014) Fault Diagnosis of Ball Bearing Using Time Domain Analysis and Fast Fourier Transformation. International Journal of Engineering Sciences & Research Technology, 3, 711-715.

[14]   Vrabie, V., Granjon, P., Maroni, C.S. and Leprettre, B. (2004) Application of Spectral Kurtosis to Bearing Fault Detection in Induction Motors. Proceedings of the 5th International Conference on Acoustical and Vibratory Surveillance Methods and Diagnostic Techniques (Surveillance 5), Senlis, 11-13 October 2004, 1-12.

[15]   Sawalhi, N. and Randall, R.B. (2004) The Application of Spectral Kurtosis to Bearing Diagnostics. Proceedings of Acoustics 2004, Gold Coast, 3-5 November 2004, 393-398.

[16]   Anderson, T.V. and Mattson, C.A. (2012) Propagating Skewness and Kurtosis through Engineering Models for Low-Cost, Meaningful, Nondeterministic Design. ASME Journal of Mechanical Design, 134, 1009-1011.

[17]   DeCarlo, L.T. (1997) On the Meaning and Use of Kurtosis. Psychological Methods, American Psychological Association, 2, 292-307.

[18]   Pimentel-Junior, G.L.S., Oliveira, F.B. and Faria, M.T.C. (2015) Acoustic Emission Tests on the Analysis of Cracked Shafts of Different Crach Depths. Proceedings of the 23rd ABCM International Congress of Mechanical Engineering, Rio de Janeiro,6-11 December 2015, 1-8.

[19]   Lipinski, P. and Yatsymirskyy, M. (2007) Efficient 1D and 2D Daubechies Wavelet Transforms with Application to Signal Processing. Proceedings of the 8th International Conference ICANNGA 2007, Warsaw, 11-14 April 2007, 391-398.