Damage evolution in wood – pattern recognition based on acoustic emission (AE) frequency spectra

Baensch, Franziska; Sause, Markus G.R.; Brunner, Andreas J.; Niemz, Peter (2015). Damage evolution in wood – pattern recognition based on acoustic emission (AE) frequency spectra Holzforschung, 69(3), pp. 357-365. De Gruyter 10.1515/hf-2014-0072

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Tensile tests of miniature spruce wood specimens have been performed to investigate the damage evolution in wood at the microscopic scale. For this purpose, the samples were stepwise tensile loaded in the longitudinal (L) and radial (R) directions and the damage evolution was monitored in real-time by acoustic emission (AE) and synchrotron radiation micro-computed tomography (SRμCT). This combination is of outstanding benefit as SRμCT monitoring provides an insight on the crack evolution and the final fracture at microscopic scale, whereas AE permits the detection of the associated accumulation and interaction of single damage events on all length scales with high time resolution. A significant drawback of the AE testing of wood has been overcome by means of calibrating the AE amplitudes with the underlying crack length development. Thus, a setup-dependent and wood species-dependent calibration value was estimated, which associates 1 μm.

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Architecture, Wood and Civil Engineering School of Architecture, Wood and Civil Engineering > Institute for Materials and Wood Technology BFH Centres and strategic thematic fields > BFH Centre for Wood - Resource and Material School of Architecture, Wood and Civil Engineering > Institut for Building Materials and Biobased Products IBBM
Name:	Baensch, Franziska; Sause, Markus G.R.; Brunner, Andreas J. and Niemz, Peter
Subjects:	Q Science > Q Science (General) Q Science > QC Physics T Technology > T Technology (General) T Technology > TH Building construction T Technology > TJ Mechanical engineering and machinery
ISSN:	1437-434X
Publisher:	De Gruyter
Language:	English
Submitter:	Christelle Ganne-Chédeville
Date Deposited:	15 Apr 2020 11:01
Last Modified:	04 Dec 2023 14:38
Publisher DOI:	10.1515/hf-2014-0072
Uncontrolled Keywords:	acoustic emission crack growth damage evolution frequency spectrum microscopic damage mechanisms Spruce unsupervised pattern recognition
ARBOR DOI:	10.24451/arbor.11288
URI:	https://arbor.bfh.ch/id/eprint/11288