20 research outputs found
Direct Numerical Simulation of Fracture Behaviour for Random Short Wood Fibres Reinforced Composites, Comparison with Digital Image Correlation Experiments
The work is to predict fracture behaviour of bio-composites from the tensile
properties of its components. In this work, we have realized a direct numerical
simulation of fracture behaviour for random short spruce fibers reinforced
composites. For calculations, wood fibers have been considered as linear elastic
bodies, polypropylene matrix as an elastic-plastic material. Then, numerical
results have been compared with experimental results that have been obtained by
digital image correlation. This comparison indicates that random fiber FE model
of random short spruce fibers reinforced composites can be able to fairly
reflect the influence of random fibers microstructure in the composite on its
fracture behavior. The calculation of both random fiber and homogeneous FE model
and their comparison with experiments show that the average values of J-integral
in a region in the front of the crack tip from both numerical FE models are in
good agreement with the average J value of DIC experiment in the same region
when the numerical and experimental CT specimens of the short spruce fiber
reinforced composite are subjected to the same extension at their loading
point