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Monitoring the fracture of wood in torsion using acoustic emission

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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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Authors and Affiliations

  1. University of New Brunswick, Canada

    Zheng Chen, Brian Gabbitas & David Hunt

Authors
  1. Zheng Chen
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  2. Brian Gabbitas
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  3. David Hunt
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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

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