Abstract
The paper presents a simple mathematical model of drying that permits evaluation of moisture content distribution in dried wood during the constant and falling drying rate periods and, in particular, estimation of stresses generated from the moment when the moisture content at the body surface reaches the fibre saturation point (FSP). The acoustic emission method (AE) is used for monitoring the state of stress in dried wood. The numerically evaluated drying induced stresses are compared with the number of acoustic signals and their energy monitored on line during drying tests. It can be stated that the enhanced emission of acoustic signals occurs at those moments when the drying induced stresses approach their maximum. Both the numerical calculus and the experimental tests were conducted on a pine-wood sample in the form of a disk.
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References
Glijer, L., Matejak, M., Osipiuk, J.: Theory and Technology of Wood Drying, p. 238. PWN, Warszawa (1984)
Kowalski, S.J.: Thermomechanics of Drying Processes, p. 365. Springer Verlag, Heilderberg-Berlin (2003)
Kowalski, S.J., Moliński, W., Musielak, G.: Identification of fracture in dried wood based on theoretical modelling and acoustic emission. Wood Sci. Technol. 38, 35–52 (2004)
Kowalski, S.J., Rajewska, K.: Drying-induced stresses in elastic and viscoelastic saturated materials. Chem. Eng. Sci. 57, 3883–3892 (2002)
Kowalski, S.J., Smoczkiewicz, A.: Identification of wood destruction during drying. Maderas: CIENCIA Y TECNOLOGIA 6(2), 133–144 (2004)
Milota, M.R., Qinglin, W.: Resolution of the stress and strain components during drying of soft wood. In: Proceedings of the 9th International Drying Symposium (IDS 1994), pp. 735–742. Gold Coast, Australia (1994)
Moon, P., Spencer, D.E.: Field Theory for Engineers. p. 600. PWN, Warszawa (in Polish) (1966)
Pang, S.: Modelling of stress development during drying and relief during steaming in Pinus radiata lumber. Drying Technol. 18(8), 1677–1696 (2000)
Welty, J.R., Wicks, C.E., Wilson, R.E.: Fundamentals of Momentum, Heat and Mass Transfer. Willey, New York (1976)
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© 2006 Springer Science+Business B. V.
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Kowalski, S.J., Smoczkiewicz-Wojciechowska, A. (2006). Stresses in dried wood. Modelling and experimental identification. In: Kowalski, S.J. (eds) Drying of Porous Materials. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5480-8_12
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DOI: https://doi.org/10.1007/978-1-4020-5480-8_12
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Publisher Name: Springer, Dordrecht
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Online ISBN: 978-1-4020-5480-8
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