Predicting Flexural Creep in Particleboard

Authors

  • Chen-Fu Yang
  • John G. Haygreen

Abstract

An analytical expression that relates flexural creep behavior to time, temperature, and stress was used in this study to predict the long-time performance of a commercial particle-board from the short-time behavior exhibited in a conventional static bending test. The particleboard exhibited a hyperbolic deflection—log time relationship under all conditions studied while deflection predicted from tests at elevated temperature was nearly linear with log of time. Both Larson-Miller and Goldfein parameters provide reasonable estimates at low stress levels. At higher stress levels, the Larson-Miller parameter provides more conservative estimates of the behavior in the 1000-3000 hr range. Neither method predicts accurately the increasing creep rates at the high stress levels and longer times.

References

Bryan, E. L. 1960. Bending strength of particleboard under long term load. Forest Prod. J., 10(4):200-204.nBryan, E. L., and A. P. Schniewind. 1965. Strength and rheological properties of particle-board as affected by moisture content and sorption. Forest Prod. J., 15(4):143.nCarey, R. H., and E. T. Oskin. 1956. The prediction of long time stress rupture data from short time tests. Soc. Plastics Eng. J., 12(3):21-25.nC.S.I.R.O. Aust. Div. Forest Prod. Ann. Report 1966/1967 and 1967/1968.nGloor, W. E. 1958. Application of Larson-Miller correlation to service test data on high density polyethylene. Mod. Plastics, 36(2): 144.nGoldfein, W. E. 1954. Time temperature relationship for rupture stresses in reinforced plastics. Proc. ASTM, 54:1344-1365.nGoldfein, S. 1960. General formula for creep and rupture in plastics. Mod. Plastics, 37: 127-132.nHaygreen, J., and D. Sauer. 1969. Prediction of flexural creep and stress rupture in hard-board by use of a time-temperature relationship. Wood Sci., 1(4):241-249.nHolloman, J. H., and L. C. Jaffe. 1945. Time-temperature relations in tempering steel. Trans. Am. Inst. Mining Met. Eng. Iron & Steel Div., 162:223-249.nLarson, F. R., and J. Miller. 1952. A time-temperature relationship for rupture and creep stresses. ASME. Trans., 74(5):765-771.n

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Published

2007-06-05

Issue

Number 3 / Fall 1971

Section

Research Contributions

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