Abstract
This paper studies failure of birch pulp-polylactic acid
composites. Stiffness and strength are calculated using
the theory
of short fibre composites and the results are compared to
experimental data. The results differed from the
experimental
values by 0-6%. With less aligned fibres the short fibre
theory is not feasible. The performance of the 40 wt%
birch pulp -
polylactic acid composite is predicted with X-ray
microtomography based finite element modelling, and the
results are
compared with experiments. Stiffness results differed
from experiments by 1-17% . By adding into the models a
third
material phase representing the interface between the
fibres and the matrix, the stress-strain curve of the
composite
was obtained with good accuracy. The work presents finite
element modelling methodology of wood plastic composites
and the critical further steps needed in order to assess
the stress-strain behaviour, strength and stiffness.
Tools for
comparing different wood plastic composite
microstructures are also presented.
Original language | English |
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Pages (from-to) | 2549-2563 |
Journal | Journal of Composite Materials |
Volume | 50 |
Issue number | 18 |
DOIs | |
Publication status | Published - 2016 |
MoE publication type | A1 Journal article-refereed |
Keywords
- fibres
- polymer matrix composites
- short fibre composites
- strength
- elastic properties
- finite element modelling
- model
- microtomography
- image analysis
- ProperTune