Page 139 - Template Tesis UTM v2.0

4.7 Flexural Property

The Flexural test was performed on the three points bending mode using a

universal testing machine (UTM), Instron Model 5969. The test was conducted based

on recommendations and procedures stated in ASTM D790-03 [126]. This test method
involves determining the flexural properties of reinforced and unreinforced plastics, as

well as high-modulus composite materials. Moreover, flatwise tests were employed

for all the hybrid and pure composite laminates with the specimens in the form of
rectangular cross section rest on two supports and loaded by means of a loading nose

midway between the supports. From this test, the flexural strength and flexural
modulus were obtained. Table 4.4 shows the summary of flexural properties for hybrid

and pure composite laminates discussed in this study.

Table 4.4 Flexural properties of the hybrid and pure composites

Flexural Flexural Specific Specific Flexural
No Sample Strength Modulus Flexural Modulus
3
(MPa) (GPa) Strength (GPa.dm /kg)
3
(MPa.dm /kg)
1 G2/B3/G2 413.0 19.2 223.8 10.4

2 G2/J3/G2 337.0 16.6 235.7 11.6

3 G2/F3/G2 237.0 12.2 151.9 7.8

4 [G/B]3G 373.0 16.5 201.0 8.8

5 [G/J]3G 298.0 15.3 210.6 10.8

6 [G/F]3G 212.0 11.5 140.4 7.6

7 G7 242.0 11.2 128.4 5.9

8 B7 335.0 15.9 188.7 9.0

9 J7 77.0 4.8 71.6 4.4

10 F7 72.0 3.0 62.1 2.6

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