Creep Functions for Wood Composite Materials
Keywords:
Creep, plywood, oriented strandboard, laminated timber, dry-process hardboardAbstract
Two related functions used to describe the creep of non-wood materials were fitted to data for wood composite materials. The first function, which is linear in its constants, was unsatisfactory for representing the creep of plywood, oriented strandboard, laminated timber, and dry-process hardboard under the given loading and environmental conditions. The second function is nonlinear in its constants. Creep of plywood and oriented strandboard were moderately well represented by this function, while creep of laminated timber and hardboard were exceptionally well represented. Experimental creep data and estimates of empirical constants are presented.References
ACI. 1988. Prediction of creep, shrinkage and temperature effects in concrete structures. Pages 209R-1-209R-92 in ACI Manual of Concrete Practice 1988. American Concrete Institute, Detroit, MI.nAnderson, J. 1985. The effect of moisture cycling on the creep of glulam beams. Unpublished M.S. Thesis, Washington State University, Pullman, WA. 101 pp.nBodig, J., and B. Jayne. 1982. Mechanics of wood and wood composites. Van Nostrand Reinhold Co., New York, NY. 712 pp.nConway, J. 1967. Numerical methods for creep and rupture analyses. Gordon and Breach, New York, NY. 204 pp.nGerhards, C. 1985. Time-dependent bending deflections of Douglas-fir 2 by 4's. Forest Prod. J. 35(4):18-26.nHoyle, R. 1987. Personal communication. Washington State University. Pullman, WA.nHoyle, R. R. Itani, and J. Eckard. 1986. Creep of Douglas-fir beams due to cyclic humidity fluctuation. Wood Fiber Sci. 18(3):468-477.nKong, F., R. Evans, E. Cohen, and F. Roll, eds. 1983. Handbook of structural concrete. McGraw-Hill Co., New York, NY.nLaufenberg, T. 1987. Personal communication. Forest Products Laboratory. Madison, WI.nO'Halloran, M. 1987. Personal communication. American Plywood Association. Tacoma, WA.nPeleg, M. 1979a. A model for creep and early failure. Mater. Sci. Eng. 40:197-205.nPeleg, M. 1979b. Characterization of the stress relaxation curves of solid foods. J. Food Sci. 44(1):277-281.nPeleg, M. 1980. Linearization of relaxation and creep curves of solid biological materials. J. Rheology 24(4):451-463.nPierce, C., and J. Dinwoodie. 1977. Creep in chipboard. J. Mater. Sci. 12:1955-1960.nSchniewind, A. 1968. Recent progress in the rheology of wood. Wood Sci. Technol. 2(3):188-206.nSenft, J., and S. Suddarth. 1971. An analysis of creep-inducing stress in Sitka spruce. Wood Fiber 2(4):321-327.nSmulski, S., and G. Ifju. 1987. Creep behavior of glass fiber reinforced hardboard. Wood Fiber Sci. 19(4):430-438.nSzabo, T., and G. Ifju. 1970. Influence of stress on creep and moisture distribution in wooden beams under sorption conditions. Wood Sci. 2(3):159-167.n
Downloads
Published
Issue
Section
License
The copyright of an article published in Wood and Fiber Science is transferred to the Society of Wood Science and Technology (for U. S. Government employees: to the extent transferable), effective if and when the article is accepted for publication. This transfer grants the Society of Wood Science and Technology permission to republish all or any part of the article in any form, e.g., reprints for sale, microfiche, proceedings, etc. However, the authors reserve the following as set forth in the Copyright Law:
1. All proprietary rights other than copyright, such as patent rights.
2. The right to grant or refuse permission to third parties to republish all or part of the article or translations thereof. In the case of whole articles, such third parties must obtain Society of Wood Science and Technology written permission as well. However, the Society may grant rights with respect to Journal issues as a whole.
3. The right to use all or part of this article in future works of their own, such as lectures, press releases, reviews, text books, or reprint books.
