Page 86 - Template Tesis UTM v2.0

Energy absorption increase ratio (%)

Volume fraction of Kevlar 29 (%)

Figure 2.28 Energy absorption vs volume fraction kevlar in glass/kevlar hybrid
composites [102]

2.15 High Strain-Rate Effects of Fibre Reinforced Polymer Composites

Investigation of composite structures in resisting high strain rate of dynamic
loading has gained attention from researchers, especially in military and defence

industries. Unfortunately, the responses of the polymeric composites under dynamic
loading conditions are less reported due to the limitation and availability of dynamic

testing apparatus as well as concerning on the complications of experimental setup. A

few parameters such as the constituents of the composite material, processing
techniques, fibre orientation, stacking sequence of the laminate and fibre architecture

highly influenced the materials being investigated under high strain rate loading.
Subsequently, to ensure the effective use of composite materials in critical situation

such as in safety structures, the mechanical performance of this material under high
strain rate loading condition is essential to explore and understand. Table 2.12

summarises the appropriate of testing apparatus to suit with the range of applied strain

rates.

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