Jakieła, S and Bratasz, L and Kozłowski, R (2007) Acoustic emission for tracing the evolution of damage in wooden objects. Studies in Conservation, 52 (2). pp. 101-109. ISSN 00393630

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Abstract

The monitoring of acoustic emission (AE) has allowed direct tracing of the fracturing intensity in wooden cultural objects exposed to variations in temperature (T) and relative humidity (RH). High-frequency components produced by the mechanical fracturing were extracted from the raw AE signals using the wavelet transforms. The accumulated energy of these components depended on the magnitude and rate of the RH variations. The AE activity became negligible below the allowable magnitude for the rapid RH variation established by numerical modelling, or when the time interval allowed for the RH variation was long enough. On-site AE monitoring of a wooden altarpiece in a historic church further confirmed the usefulness of the technique in tracing climate-induced stress in wood. The development of practical AE sensors to indicate risk to wooden objects in museums and at historic sites, or during their transportation, is discussed.

Item Type:	Article
Uncontrolled Keywords:	On-site AE monitoring; Church; Wooden objects; Climatic stress
Subjects:	English > Monitoring ?? monitor ??
Depositing User:	Anna Samuelsson
Date Deposited:	08 Apr 2008 12:15
Last Modified:	04 Apr 2017 09:21
URI:	http://eprints.sparaochbevara.se/id/eprint/173

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