Comments on the experimental methodology for determination of the hygro-mechanical properties of wood
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Lech Muszyński
, Rastislav Lagana , Stephen M. Shaler and William Davids
Abstract
When wood is subjected simultaneously to load and moisture content changes below the fiber saturation point, the mechano-sorptive effect may be observed as an additional deformation that cannot be attributed to simple superposition of elastic deformation, free shrinkage or swelling, or creep in steady climate conditions. The phenomenon has been subject to research for more than half a century. Although numerous mathematical models and detailed theoretical descriptions have been proposed over time, the basic mechanism of mechano-sorption has remained unclear, the experimental data are scattered and lack logical classification, and the experimental determination of its basic parameters on a material level, understood as a local property decoupled from artifacts of the testing protocol, remains a serious challenge. In this paper basic requirements for adequate experimental methods for comprehensive determination of the mechano-sorptive behavior of wood are proposed and briefly discussed. The principal requirements are that the experimental research on mechano-sorption is focused on the material level properties and elementary loading modes (tension and compression); that proper attention is paid to the effect of changing distribution of moisture content within the tested volume; and that the tests are designed so that a comprehensive separation of strain components is enhanced.
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©2005 by Walter de Gruyter Berlin New York
Articles in the same Issue
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- Study of the oxygen effect on mechanical pulp lignin using an improved lignin isolation method
- Quantitative 1H NMR analysis of alkaline polysulfide solutions
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- Leaf-fiber lignins of Phormium varieties compared bysolid-state 13C NMR spectroscopy
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Articles in the same Issue
- Obituary
- The role of non-phenolic lignin in chlorate-forming reactions during chlorine dioxide bleaching of softwood kraft pulp
- Study of the oxygen effect on mechanical pulp lignin using an improved lignin isolation method
- Quantitative 1H NMR analysis of alkaline polysulfide solutions
- A comparative study on the degradation of cotton linters induced by carbonate and hydroxyl radicals generated from peroxynitrite
- The carbonate radical as one-electron oxidant of carbohydrates in alkaline media
- Leaf-fiber lignins of Phormium varieties compared bysolid-state 13C NMR spectroscopy
- Antifungal activity of iridoid glycosides from the heartwood of Gmelina arborea
- Antioxidant activity of different components of pine species
- Dislocations in Norway spruce fibres and their effect on properties of pulp and paper
- Isolation and identification of antifungal compounds from Amboyna wood
- Biomechanical pulping of spruce wood chips with Streptomyces cyaneus CECT 3335 and handsheet characterization
- Three-dimensional visualisation of bacterial decay in individual tracheids of Pinus sylvestris
- Mass loss and moisture dynamics of Scots pine (Pinus sylvestris L.) exposed outdoors above ground in Sweden
- The influence of cation and anion structure of new quaternary ammonium salts on adsorption and leaching
- Speciation of arsenic and chromium in the leachate from chromated copper arsenate (CCA) type C treated southern pine (Pinus spp.)
- Metal chelation studies relevant to wood preservation.1. Complexation of propyl gallate with Fe2+
- Comparison of UV and confocal Raman microscopy to measure the melamine–formaldehyde resin content within cell walls of impregnated spruce wood
- Comparison of Pinus taeda L. wood property calibrations based on NIR spectra from the radial-longitudinal and radial-transverse faces of wooden strips
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- Effect of cross-sectional change of a board specimen on stress wave velocity determination
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