Study of the Frictional Surface Damage Using Acoustic Emission Method

Ahmadi, Mehdi

Study of the Frictional Surface Damage Using Acoustic Emission Method

Document Type : Persian

Author

Mehdi Ahmadi

Associate Professor, Mechanical Engineering Department, Islamic Azad University, Dezful Branch

Abstract

In this study, the change at rubbing surfaces has been investigated experimentally using an acoustic emission signal monitoring system. A steel ring is slipped on the surface of a metallic sheet to simulate frictional conditions. The mechanical disturbances caused by the movement of the ring produce stress waves propagating along the sheet surface. The out of plane displacement of the sheet surface is sensed by a piezoelectric sensor. The electrical signal of the sensor output is received and used to analyze the frictional conditions between rubbing surfaces. The experimental results show that the effect of different frictional parameters such as normal load, surface material and lubrication on the surface damages can be recognized by analyzing the acoustic emission signals. For example, vanishing of the thin lubricant film between the two rubbing surfaces can be distinguished from the damage signals which are appeared with specific range of frequencies and amplitudes. The sensitivity of acoustic emission to detect frictional damages is considerably higher than that of monitoring of the friction coefficient.

Keywords

References

[1]Baranov V.M., Kudryavtsev E.M., Sarychev G.A. and Schavelin V.M., Acoustic Emission in Friction, 1st ed. London, Elsevier Pub., 2007.

[2] ASMHandbook, Vol. 17, Nondestructive Evaluation, American Society for Testing and Materials (ASM International), 1994, pp.
661-702.

[3] Jiaa C.L. and Dornfeld D.A., Experimental Studies of Sliding Friction and Wear via Acoustic Emission Signal Analysis, Wear 139, 1990, pp. 403-424.

[4] Belyi V.A., Kholsdilov O.V. ,Syirdyinik A.L., Acoustic spectrometry as used for the evaluation of tribological systems, Wear69, 1981, pp.
309-319.

[5] Diei E.N., Investigation of the milling process using acoustic emission signal analysis, Ph.D. Thesis, Department of Mechanical Engineering, University of California, Los Angeles, 1979.

[6] Dornfeld D. A., Acoustic emission monitoring and analysis of manufacturing processes, 12th National Science Foundation Conf. On Production Research and Technology (May 1985), Presented at the proceedings, University of Wisconsin, Madison, WI, 1985, pp. 329-334.

[7] Liang S.Y. , Dornfeld D.A., Punch stretching processes monitoring using acoustic emission signal analysis, Part 1, Basic characteristics, J. of Acoustic Emission 6(1), 1987, pp. 29-36.

[8] Diei E.N. and Dornfeld D.A. Acoustic emission sensing of tool wear in face milling, J. Eng. Ind. 104, 1987, pp. 234-240.

[9] Masaki T., Use of acoustic emission for the study of wear, S.B. Thesis, Department of Mechanical Engineering, MIT, Cambridge, MA, 1986.

[10]Rangwala, S. and Dornfeld D.A., Application of acoustic emission sensing to the analysis of contact between rough metallic surfaces, ESRC Rep, 1988.

[11]Lingard S., An investigation of acoustic emission in sliding friction and wear of metals, Wear 130, 1989, 367.

[12] Hisakado, T. ,Warashina, T., Relationship between friction and wear propertied and acoustic emission characteristics: iron pin on hardened bearing steel disk, Wear 216, 1997, pp. 1-7.

Van der Heide E., Huis Veld A.J., The effect of