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4.8 Quasi-Static Indentation Property

The quasi-static indentation test was experimentally investigated on the hybrid

composites with SL and IC specimens of G2/B3/G2, G2/J3/G2, G2/F3/G2 and [G/B]3G,

[G/J]3G, [G/F]3G, respectively. In addition, pure composites were also investigated for
G7, B7, J7 and F7. Summary of quasi-static indentation properties for all tested

specimens involved in the present study as shown in Table 4.5.

Table 4.5 Quasi-static indentation properties of hybrid and pure composites

Energy Peak force Specific energy Specific peak force
No Sample
3
3
(J) (kN) (J.dm /kg) (kN.dm /kg)
1 G2/B3/G2 11.85 1.41 6.42 0.76

2 G2/J3/G2 18.61 2.00 13.02 1.40
3 G2/F3/G2 17.67 1.54 11.33 0.99

4 G/B]3G 11.33 1.27 6.08 0.68

5 [G/J]3G 18.54 1.94 13.10 1.37

6 [G/F]3G 16.80 1.37 11.12 0.91

7 G7 29.86 0.92 15.84 0.49

8 B7 3.15 1.20 1.78 0.68

9 J7 11.63 0.95 10.82 0.89

10 F7 11.80 0.89 10.17 0.76

4.8.1 The Effects of Stacking Sequence on Quasi-Static Indentation Properties

of E-glass/Basalt, E-glass/Jute and E-glass/Flax

The energy absorption of the quasi-static indentation test was determined from
the area under the load-deflection curve for each specimen. As shown in Figure 4.13,

maximum energy for hybrid composites with different stacking sequences are not
much different between E-glass/basalt, E-glass/jute and E-glass/flax. Samples

G2/B3/G2, G2/J3/G2 and G2/F3/G2 showed a maximum energy of 11.85, 18.61 and 17.67

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