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Experimental Investigation on the Mechanial Behavior of Graphite/Epoxy Composites Under Hydrostatic Pressure

고압하에서의 적층복합재의 기계적 거동에 대한 실험적 고찰

  • Published : 1996.08.01

Abstract

In order to determine the effects of hydrostatic pressure on the mechanical behavior of graphite fiber reinforced composites, the modulus, fracture stress(maximum stress), and fracture strain of graphite/epoxy composites have been determined as a function of pressure. Composite specimens used in this study were 90-deg unidirectional and had a 60% fiber volume fraction. Compressive tests under five different pressure levels were conducted. The result showed the modulus measured from as initial slope of stress-strain curve increased bilinearly with pressure with a break at 200 MPa. It was also found that fracture stress and fracture strain increased in a linear fashion with pressure.

Keywords

Composites;Stress-Strain Curve;Compressive Modulus;Compressive Fracture Stress;Compressive Fracture Strain;Micro-Crack