Sammanfattning

Wood fibres have several highly desirable properties as reinforcement in composite materials for structural applications, e.g. high specific stiffness and strength, renewability and low cost. However, one of the main drawbacks is the swelling of these hydrophilic fibres due to moisture uptake. Since the fibres in the composite are generally embedded in a relatively hydrophobic matrix, the surrounding matrix should restrain the swelling of the fibres. The present study investigates this constraint effect and establishes a micromechanical model to predict the swelling of embedded fibres based on experimentally characterised microstructural parameters and hygroelastic properties of the constituents. The predicted swelling is in concert with direct measurement of various wood-pulp fibre composites by means of three-dimensional X-ray microtomographic images. (c) 2012 Elsevier Ltd. All rights reserved.

Nyckelord

Wood; Fibres; Hygroexpansion; Multiscale modelling; X-ray microtomography

Publicerad i

Composites Science and Technology
2013, Volym: 74, sidor: 52-59
Utgivare: ELSEVIER SCI LTD

SLU författare

• Wernersson, Erik

  • Centre for Image Analysis, Sveriges lantbruksuniversitet
    

• Luengo, Cris

  • Centre for Image Analysis, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Datorseende och robotik (autonoma system)
Biomaterial


Publikationens identifierare

DOI: https://doi.org/10.1016/j.compscitech.2012.10.006

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/52925