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Duration-of-load and creep effects in strand-based wood composite: a creep-rupture model

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Abstract

In order to investigate the creep and duration-of-load (DOL) effects in thick strand-based wood composite products, a creep-rupture model is proposed linking the accumulated damage to creep deformation. Results from long-term constant load tests have been interpreted by means of this creep-rupture model, which is capable of representing the time-dependent deflection and time-to-failure data at different stress levels. The predictions of the model have been verified using results from ramp load test at different rates of loading. The creep-rupture model incorporates the short-term strength of the material, the load history and predicts the deflection history as well as the time-to-failure. As it is a probabilistic model, it allows its incorporation into a time-reliability study of wood composites’ applications.

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Authors and Affiliations

  1. Canadian Wood Council, 99 Bank Street Suite 400, Ottawa, ON, K1P 6B9, Canada

    Jasmine B. Wang

  2. Department of Civil Engineering, University of British Columbia, 2002-6250 Applied Science Lane, Vancouver, BC, V6T 1Z4, Canada

    Ricardo O. Foschi

  3. Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada

    Frank Lam

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  1. Jasmine B. Wang
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  2. Ricardo O. Foschi
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  3. Frank Lam
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Correspondence to Jasmine B. Wang.

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Wang, J.B., Foschi, R.O. & Lam, F. Duration-of-load and creep effects in strand-based wood composite: a creep-rupture model. Wood Sci Technol 46, 375–391 (2012). https://doi.org/10.1007/s00226-011-0401-7

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  • DOI: https://doi.org/10.1007/s00226-011-0401-7

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