Characterizing the Nonlinear Behavior of Flakeboards


  • Theodore L. Laufenberg


Flakeboards, failure in bending, model predictions, stress-strain relations


To predict accurately the failure load of a layered flakeboard in bending, the stress-strain relations appropriate for each layer must be known. This paper describes the application of a method for characterizing the nonlinear behavior of a flakeboard material subjected to axial stresses. The model permits prediction of the stress-strain curve to the ultimate stress and ultimate strain points for the material regardless of fiber alignment or board density. Comparisons are made between traditional failure criteria, experimental results, and the model predictions.


Brumbaugh, J. 1960. Effect of flake dimensions on properties of particleboards. For. Prod. J.10(5):243-246.nDickerhoof, H. E., and D. B. McKeever. 1980. Resource potential for waferboard production in the USA. Presented at Can. Waferboard Symp. [Nov. 1980]. Eastern For. Prod. Lab., Forintek, Ottawa, Ont., Canada.nDixon, W. J., and M. B. Brown, Editors. 1977. BMDP-77, Biomedical computer programs, P-series, April 1977. Health Sciences Computing Facility, UCLA, Los Angeles, CA.nGeimer, R. L. 1980. Data basic to the engineering design of reconstituted flakeboard. Proc. Wash. St. Univ. Particleboard Symp. [April 1980]. WSU, Pullman, WA.nHunt, M. O., and S. K. Suddarth. 1974. Predictions of elastic constants of particleboard. For. Prod. J.24(5):52-57.nKeylwerth, V. R. 1958. Zur Mechanik der Mehrschichtigen spanplatte. Holz Roh-Werkst.16(11):419-430.nNeill, R. D. 1980. A consultant's view of present and future developments in structural board manufacturing. Presented at FPRS East. Can. Sec. Mtg. [Moncton, New Brunswick, May 15, 1980]. For. Prod. Res. Soc., Madison, WI.nO'Halloran, M. R. 1973. Curvilinear stress-strain relationship for wood in compression. Ph.D. Thesis. Colorado State University, Ft. Collins, Colo.nPost, P. W. 1961. Mechanical and dimensional properties of flakeboard. For. Prod. J.11(1):34-37.nRamberg, W., and W. R. Osgood. 1943. Description of stress-strain curves by three parameters. National Advisory Committee for Aeronautics, Tech. Note 902. National Bureau of Standards, Wash., DC.nSimpson, W. T. 1977. Model for tensile strength of oriented flakeboard. Wood Sci.10(2):68-71.n






Research Contributions