دراسة اختباري الشد والكلال لمادة الايبوكسي ومتراكباتها الهجينية

Abstract

This research is concerned the use of Epoxy resin( Cy223 ,Hy956 )which supplied from (Giba –Giegy) German company .It is a viscause liquid have a certain properties like high adhesives and low shrinkage at dry condition with addition of the hardener at ratio (1:3 ) of the resin with density about (1150 kg/m3 ) , the matrix resin forced with two type of fibers : glass fiber( E-glass) and carbon fiber (HS )(High Strength) ,the ratio of carbon fiber layers to glass fiber layers is (1:5) with volume fraction (30%) at room temperature to study tensile and fatigue tests. It is noted that the composite materials appears better resistance to the tensile test than the resin due to the resistance of fiber(especially carbon fiber which have a good mechanical properties ) .In the fatigue test , the composite material show good strength to break because of the resistance of carbon fiber at low cycle . The resistance to break remains constant or changed slowly with increasing cycle of fatigue strength depending on supporting ratio.