Measuring Poisson’s ratio: mechanical characterization of spruce wood by means of non-contact optical gauging techniques

Cedou Kumpenza*, Philipp Matz, Peter Halbauer, Maximilian Grabner, Gottfried Steiner, Florian Feist, Ulrich Müller

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


In contemporary wood science, computer-aided engineering (CAE) systems are commonly used for designing and engineering of high-value products. In diverse CAE systems, high-fidelity models with a full material description, including elastic constants such as Poisson’s ratios, are needed. Only few studies have dealt so far with the investigation of the Poisson’s ratio of spruce wood (Picea abies (L.) Karst.) or wood in general. Therefore, in the present study all six main Poisson’s ratios of spruce wood were determined in uniaxial tensile experiments by employing optical gauging techniques like electronic speckle pattern interferometry and a combination of laser and video extensometry. Consistent results for the Poisson’s ratios were found by applying these different optical gauging techniques. However, values found in the literature are sometimes considerably different from values established in this study. For that reason, the optical gauging techniques were evaluated with a conventional mechanical extensometer, which proved that there were no significant differences between the established measurements. Finally, in this study the feasibility of different non-contact optical gauging techniques was evaluated and compared through the comparison of the Poisson’s ratios, which showed that non-contact optical gauging techniques are suitable for establishing the Poisson’s ratio of (spruce) wood.

Original languageEnglish
Pages (from-to)1451-1471
Number of pages21
JournalWood Science and Technology
Issue number6
Publication statusPublished - 1 Nov 2018

ASJC Scopus subject areas

  • Forestry
  • Materials Science(all)
  • Plant Science
  • Industrial and Manufacturing Engineering


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