Time-resolved X-ray microtomographic measurement of water transport in wood-fibre reinforced composite material

37th Risø International Symposium on Materials Science

Miettinen, Arttu^1 ; Harjupatana, Tero^1 ; Kataja, Markku^1 ; Fortino, Stefania^2 ; Immonen, Kirsi^2

University of Jyväskylä, Department of Physics, P.O. Box 35 (YFL), Jyväskylä

FI-40014, Finland^1

VTT Technical Research Centre of Finland, P.O. Box 1000, VTT

FI-02044, Finland^2

关键词: Cylindrical samples;    Degradation of mechanical properties;    Digital image correlations;    Natural fibre composites;    Non-intrusive measurements;    Water content profiles;    Wood fibre reinforced composites;    X ray microtomography;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/139/1/012037/pdf
DOI  :  10.1088/1757-899X/139/1/012037

来源: IOP

【 摘 要 】

Natural fibre composites are prone to absorb moisture from the environment which may lead to dimensional changes, mold growth, degradation of mechanical properties or other adverse effects. In this work we develop a method for direct non-intrusive measurement of local moisture content inside a material sample. The method is based on X-ray microtomography, digital image correlation and image analysis. As a first application of the method we study axial transport of water in a cylindrical polylactic acid/birch pulp composite material sample with one end exposed to water. Based on the results, the method seems to give plausible estimates of water content profiles inside the cylindrical sample. The results may be used, e.g., in developing and validating models of moisture transport in biocomposites.