Fracture Behaviour Of Natural Fibre
Reinforced Composites
Author(s)
H. Takagi & Y. Hagiwara
Abstract
This paper deals with the microfracture behaviour of natural fibre reinforced
composite materials. The acoustic emission (AE) method was applied to detect
various micro-scale energy release phenomena during tensile deformation not
only of Manila hemp fibre, but also of three kinds of composites with three
different fibre orientation angles, namely 0, 45, and 90 degree. In the case of
Manila hemp fibre testing, low amplitude AE events (40–60 dB) are measured at
an intermediate strain range, and high amplitude events are also measured at a
final fracture stage. In the case of 0 degree composite, AE signals having a wide
range of amplitude distribution are measured from the beginning of deformation,
and the AE activity becomes significant with further tensile deformation. On the
other hand, a few AE data with low amplitude are measured in 45 and 90 degree
composites. In conclusion, low and high amplitude AE events observed during
tensile deformation of natural fibre composites are derived from fibre splitting
and fibre fracture, respectively.
Keywords: microfracture, acoustic emission, starch based resin, hemp fibre,
fibre fracture, debonding.
1 Introduction
Recently, much of the research on natural fibre composites has been carried out
in Europe, North America, and Asia and focused on the enhancement of their
mechanical properties [1–13]. The natural fibre composites are the composite
material that usually consists of biodegradable resin matrix mainly derived from
natural resources and natural plant fibre as reinforcement. Therefore, they are
derived from yearly renewable resources, and at the same time their disposal
Keywords
microfracture, acoustic emission, starch based resin, hemp fibre,
fibre fracture, debonding
Related Book
Other papers in this volume
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