Wood Science and Technology

, Volume 47, Issue 3, pp 537–555 | Cite as

An original impact device for biomass characterisation: results obtained for spruce and poplar at different moisture contents

  • Floran PierreEmail author
  • Giana Almeida
  • Françoise Huber
  • Philippe Jacquin
  • Patrick Perré


This paper describes an experimental device designed to determine the mechanical behaviour of lignocellulosic products subjected to high strain rates. This impact system consists of a moving trolley equipped with an accelerometer, which is thrown against a fixed trolley. The sample is attached to the fixed trolley, and the accelerations of both trolleys during the impact are analysed to obtain stress/strain curves. A high-speed camera synchronised with a high-powered xenon flash records up to 4,000 frames/s. A set of tests on wood samples is described to illustrate the potential of this new device. In particular, the cross-effects of compression rate and moisture content were demonstrated by performing both quasi-static (1 mm min−1 using a conventional testing machine) and dynamic tests (1.7 m s−1 using the impact device). Poplar and spruce samples, equilibrated at three different moisture contents (air-dried, fibre saturation point (FSP) and fully saturated), were tested. Two findings are particularly worthy of mentioning: (1) despite the plasticising role of water, the sample at FSP exhibited a fragile behaviour at the high compression rate, (2) the resistance due to the expulsion of water out of saturated samples can be assessed only by performing an impact test.


Poplar Wood Sample Compression Rate Saturated Sample Fibre Saturation Point 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was financially supported by the ANR project TORBIGAP. The authors are grateful to the personnel of the LERFoB 3B team.

Supplementary material

Supplementary material 1 (MPG 1394 kb)

Supplementary material 2 (MP4 5491 kb)

Supplementary material 3 (MP4 10716 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Floran Pierre
    • 1
    Email author
  • Giana Almeida
    • 2
    • 3
  • Françoise Huber
    • 4
  • Philippe Jacquin
    • 4
  • Patrick Perré
    • 1
  1. 1.LGPMEcole Centrale ParisChâtenay-MalabryFrance
  2. 2.UMR 1145 Ingénierie Procédés AlimentsAgroParisTechMassyFrance
  3. 3.UMR 1145 Ingénierie Procédés AlimentsINRAMassyFrance
  4. 4.UMR 1092, LERFoB Bois Biomateriaux Biomasse TeamINRANancyFrance

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