Page 113 - Template Tesis UTM v2.0

Table 3.3 Peak energy of S2/SC-15 glass /epoxy composite at different strain rate
[92].

Rate (mm/min) Peak Energy (J)

1.2 30.46 ± 0.64

2.5 30.44 ± 0.49
10.0 30.58 ± 0.91

25.0 30.88 ± 0.54

50.0 31.61 ± 0.65

The test was performed using the Universal testing machine (UTM), Instron
Model 5982 under compression testing mode with a hemispherical nose indentor of

diameter 12.7 mm as shown in Figure 3.7. The specimen was supported on a
rectangular opening of 75 x 75 mm. The indentor displacement was controlled by the

testing machine crossbar at a constant rate of 1.0 mm/min until the energy reached a
maximum value. The total energy absorption was calculated from the area under the

load-deflection curve of the tested specimen. To maintain the accuracy of the test data,

five indentation tests were performed for each of the laminate to obtain the average
data.

100 mm

100 mm
(a) (b)

Figure 3.7 (a) Instron 5982, and (b) Quasi-static sample size

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