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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Fatigue life of structural plywood under two-stage panel shear load: a new cumulative fatigue damage theory

Journal of Wood Science volume 53, pages 211–217 (2007)Cite this article

Abstract

The fatigue life of structural plywood under two-stage panel shear load was experimentally examined. Two experimental conditions were determined for two-stage fatigue of plywood specimen: one used variable applied stress and the other used variable stress, loading waveform, and loading frequency, because fatigue life of wood composite under constant load depended on loading waveform and loading frequency as well as stress level. The most famous cumulative fatigue damage theory is the Palmgren-Miner rule, which is the summation of the ratio of the applied loading cycle to the fatigue life under each loading stage. However, the applicability of this rule to the two-stage fatigue of wood composites has not been investigated. It was first demonstrated in this study that the fatigue life of the plywood specimen reached in the two-stage fatigue test did not obey the Palmgren-Miner rule. Here, we propose the new cumulative fatigue damage model by modification of the Palmgren-Miner rule on the basis of the assumption that fatigue damage accumulates with loading cycle on a logarithmic scale. The newly proposed model was in good agreement with the fatigue life reached in the two-stage fatigue test.

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Authors and Affiliations

  1. Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan

    Takanori Sugimoto & Yasutoshi Sasaki

Authors
  1. Takanori Sugimoto
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  2. Yasutoshi Sasaki
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Correspondence to Yasutoshi Sasaki.

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Sugimoto, T., Sasaki, Y. Fatigue life of structural plywood under two-stage panel shear load: a new cumulative fatigue damage theory. J Wood Sci 53, 211–217 (2007). https://doi.org/10.1007/s10086-006-0855-7

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  • DOI: https://doi.org/10.1007/s10086-006-0855-7

Key words

  • Two-stage fatigue
  • Fatigue life
  • Palmgren-Miner rule
  • New cumulative fatigue damage model