Page 99 - Template Tesis UTM v2.0

2.16 Summary

The present study investigated on two different loading conditions applied to

the hybrid and pure composites to closely suit with the real situations when these kinds

of structures are in practice. Almost of the previous literatures investigated on one
loading condition only, such as on tensile and flexural loadings (static), or high strain

rates effects (dynamic) for material properties characterisation. Literature wise, there

is no study dealing with both situations where static and dynamic behaviours of the
tested specimens were characterised on tensile, flexural, quasi-static indentation and

low velocity impact, and split Hopkinson pressure bar, respectively. In order to have
wide-ranging of mechanical behaviours of new introduced hybrid laminates, an

extensive static and dynamics testing as mentioned has to be carried out.

Furthermore, almost of the previous studies used only one type of synthetic

and natural fibre such E-glass/basalt. Hence, it is difficult to make a comparative study
or to determine the best combination of synthetic and natural fibres for hybridisation

purposes. Therefore, to effectively introduce new eco hybrid composites, several of

hybrid configurations have to be introduced between one type of synthetic fibre of E-
glass with three types of natural fibres either basalt, jute or flax in creating hybrid

composites of E-glass/basalt, E-glass/jute and E-glass/flax. At the same time, the pure

composite laminates are also needed to be characterised to investigate on the effect of
hybridisation and for the comparison purpose with the new introduced hybrid

laminates. Hence, the potential and contribution of embedding natural resources in
composite system can be discovered.

Besides that, it was found that some of previous literatures were not highly
concerned on the arrangement of reinforcements and volume fraction of hybrid

constituents that are among the highly influenced factors which significantly affected

the properties of the materials being investigated. Therefore, the effect of stacking
sequences needs to be investigated with an equal percentage of fibre volume fraction,

between synthetic and natural fibres to make a reliable comparison between SL and

IC sequences of hybrid composites. Moreover, in order to have a clear effect of
stacking sequences it is recommended to fix the outer layers for both sequences for

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