Page 191 - Template Tesis UTM v2.0

CHAPTER 5

CONCLUSION AND RECOMMENDATIONS

5.1 Conclusion

Static and dynamic mechanical properties characterisation of hybrid composite

of E-glass/basalt, E-glass/jute and E-glass/flax as well as pure laminates of E-glass,
basalt, jute and flax reinforced epoxy on tensile, flexural, quasi-static indentation, low

velocity impact and split Hopkinson pressure bar (SHPB) have been successfully
performed. The effect of stacking sequence and hybrid configuration for hybrid

composites between SL and IC sequences, the effect of hybridisation between E-
glass/basalt, E-glass/jute and E-glass/flax compare to those pure composite laminates

as well as the effect of strain rate loading conditions were completely investigated and

analysed. From the overall results, the following conclusions can be drawn:

On the tensile properties, it was observed that the effect of stacking sequences is

slightly decreased throughout the transition from the SL to IC sequence. The effect of
hybridisation was remarkable for G2/J3/G2 and G2/F3/G2 with the increasing about 51.4

and 56.6 % when E-glass was embedded on the tensile strength. On the effect of
reinforcement selection, specific tensile properties of G2/B3/G2 exhibited the highest

specific tensile strength and modulus, followed by G2/F3/G2 and G2/J3/G2.

The G2/B3/G2, G2/J3/G2 and G2/F3/G2 exhibited higher flexural strength and
modulus compared to [G/B]3G, [G/J]3G and [G/F]3G. The presence of E-glass in the

hybrid composites of E-glass/jute and E-glass/flax able to compensate the inferior
properties of jute and flax fibres with the increasing of flexural strength about 77 and

72 %, respectively. On the specific flexural properties, the E-glass/jute exhibited the
highest properties compared to E-glass/basalt and E-glass/flax. This kind of

combination is very crucial in developing high strength and stiffness to weight-ratio

of the composite structures. On top of that, almost of the SEM micrographs of bending

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