Abstract
Effects of the contact geometry on high strain rate failure behavior of woven graphite/epoxy composites are presented. Compressive split Hopkinson pressure bar was used for high strain rate experiments. Woven graphite/epoxy composites were loaded transversely using two different contact geometries at the impact energies of 67 J and 163 J. It is observed that smaller contact area gives higher damage, resulting in higher energy absorption, elastic modulus and strain rate and peak stress in the specimens.
Highlights
Composite materials have been widely used in many applications in which high strength to weight ratio is required such as aircraft structures, space shuttles, armored vehicles, and automobiles (Daniel & Ishai, 1994)
In some cases such as automobile accidents, bird strikes on aircraft structures, and ballistic impact loading on armored vehicles, these composites are exposed to high strain rate loading and it is vital to understand the effect of the loading direction on high strain rate behavior of woven graphite/epoxy composites
A comprehensive study has been done by Wosu et al (2003) to understand the high strain rate behavior of woven carbon composite materials fabricated by low cost vacuum assisted resin infusion molding (VARIM) processusing compression split Hopkinson pressure bar at high strain rates ranging from 320 s-1 to 1149 s-1
Summary
Composite materials have been widely used in many applications in which high strength to weight ratio is required such as aircraft structures, space shuttles, armored vehicles, and automobiles (Daniel & Ishai, 1994). A comprehensive study has been done by Wosu et al (2003) to understand the high strain rate behavior of woven carbon composite materials fabricated by low cost vacuum assisted resin infusion molding (VARIM) processusing compression split Hopkinson pressure bar at high strain rates ranging from 320 s-1 to 1149 s-1. Hsiao et al (1999) carried out a research to study the strain rate effects on the transverse compressive and shear behavior of 72- and 48-ply unidirectional carbon/epoxy composites at strain rates up to 1800 s-1using split Hopkinson pressure bar. The objective of the present study is to determine the effect of contact geometry on the high strain rate behavior of transversely loaded woven graphite/epoxy composites
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