Abstract
Acoustic emission (AE) was used to monitor the failure process of hardwood and softwood test-pieces under static and fatigue torsional loading. In static torsional-loading tests, acoustic activity indicated some microcrack initiation before the visible cracking in both hardwood and softwood test-pieces. Hardwood produced more AE counts than softwood during testing, and the grain angle of test-pieces influenced the total AE counts. During torsional fatigue fracture, increased acoustic activity indicated the onset of microcrack formation. Fatigued test-pieces produced more total AE counts during fracture than static test-pieces, provided the angle of twist exceeded a minimum value. The results show that it is possible to monitor and analyze the failure process in wood when under torsional loading using acoustic emission techniques.
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References
R. G. LIPTAI, D. O. HARRIS and C. A. TATRO, in “Astm-Stp” 505 (1972).
A. E. LORD JR., Phys. Acousti. 15 (1983) 295.
R. W. NICHOLS, in “Acoustic Emission” (Applied Science, London, UK, 1976).
L. C. LYNNWORTH, in “Ultrasonic Measurements for Process Control, Theory, Techniques, Applications” (Academic Press, New York, USA, 1989).
R. B. STEPHENS and H. C. LEVINTHALL, in “Acoustics and Vibration Progress ” (Chapman & Hall, London, UK, 1974).
R. V. WILLIAMS, in “Acoustic Emission ” (Adam Hilger Ltd., Bristol, England, 1980).
V. BUCUR, in “Acoustics of Wood ” (CRC Press, Boca Raton, New York, USA, 1995) 221.
S. L. QUARLES, Wood Fibre Sci. 24 (1992) 2.
I. D. BOOKER, Holz Roh-Werkstoff 52 (1994a) 383.
J. D. BOOK, Wood Sci. and Tech. 28 (1994b) 249.
S. J. KOWALSKI, W. MOLIŃSKI and G. MUSIELAK, ibid. 38 (2004) 35.
M. P. ANSELL, ibid. 16 (1982) 35.
A. P. SCHNIEWIND, S. L. QUARLES and H. LEE, ibid. 30 (1996) 273.
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Chen, Z., Gabbitas, B. & Hunt, D. Monitoring the fracture of wood in torsion using acoustic emission. J Mater Sci 41, 3645–3655 (2006). https://doi.org/10.1007/s10853-006-6292-6
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DOI: https://doi.org/10.1007/s10853-006-6292-6