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EFFECTS OF HUMIDITY CHANGES ON DAMPING AND STRESS-RELAXATION IN WOOD
1993 (English)In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, ISSN 0022-2461, Vol. 28, no 20, p. 5668-5674Article in journal (Refereed) Published
Abstract [en]

Mechanical damping (tan delta) and stress relaxation on pine veneer samples under stepwise humidity changes were investigated. The loss factor shows a transient peak every time the relative humidity (RH) of the surrounding atmosphere is changed, The effect appears to be associated with the diffusion of water molecules into or out of the material, the peaks being observed both when the sample is humidified (5%-85% RH) or subjected to drying. The results are supplemented by stress relaxation data obtained on similar specimens. Also in this case a higher relaxation rate is observed when the RH level around the sample is changed, the total stress decrease after several cycles being significantly larger than the corresponding value observed after the same period at the higher RH level.

Place, publisher, year, edition, pages
2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN: CHAPMAN HALL LTD , 1993. Vol. 28, no 20, p. 5668-5674
Identifiers
URN: urn:nbn:se:miun:diva-11310OAI: oai:DiVA.org:miun-11310DiVA, id: diva2:298378
Available from: 2010-02-22 Created: 2010-02-22 Last updated: 2017-12-12Bibliographically approved

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Ebrahimzadeh, PR

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