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Gewählte Master / Diploma Thesis:

Philipp Matz (2018): Die Bestimmung der Poissonzahlen und anderer elastischer Konstanten von Holz und Holzwerkstoffen für die Erstellung eines FE-Modells für Massivholzprodukte.
Master / Diploma Thesis - Institut für Holztechnologie und Nachwachsende Rohstoffe, BOKU-Universität für Bodenkultur, pp 71. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Abstract:
Currently a computer-aided engineering (CAE) approach in wood technology is applied for designing and engineering products with higher added value. CAE is based on numerical methods like Finite Element Modelling (FEM). In FEM a full material description, including Poisson’s ratios and shear moduli, is needed. Only few studies have dealt with the investigation of the Poisson’s ratio and shear moduli of different wood species and wood-based materials. Therefore, in the presented study all six main Poisson’s ratios of spruce (Picea abies L.) and oak wood (Quercus robur L.) as well as different wood based materials (WPC, HDF) were determined in uniaxial tensile experiments, employing optical gauging techniques like Electronic-Speckle-Pattern-Interferometry (ESPI) and a combination of laser and video extensometry. The shear modulus of WPC was determined by using the Arcan-Shear-Test in combination with ESPI measurements. The results of the Poisson´s ration of oak and spruce obtained from the two different gauging techniques show consistent values. The results of oak are in the range of the literature values, nevertheless the Poisson´s ratios for spruce partly show significant differences to the references. The determined values for WPC and HDF show low variability. Experiments with the Arcan-Shear-Test pointed out that this test set-up is useable for measuring the shear modulus of WPC and other wood-based materials.

Beurteilende(r): Müller Ulrich

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