ASPECTS CONCERNING TO THE IMPACT CHARPY TESTING IN CASE OF COMPOSITES MATERIALS FILLED WITH WOOD FLOUR

Abstract

The paper analyses the effects of some internal factors(type of reinforcement, number of layers)on the impact characteristics in case of some composite materials reinforced with woven fabrics made of E-glass fibres. Therefore, three kinds of reinforcements were used to manufacture the composite materials: the first composite was reinforced with both four layers of glass woven fabrics and spruce wood flour while the other two composites were reinforced with seven layers of glass woven fabrics and additionally, reinforced with spruce wood flour or oak wood flour. The volume ratio of wood flour was the same for the last two composite analysed. The paper presents and analyses the results of the Charpy tests(failure energy U and resilience K)in case of the composite materials tested. Some important remarks concerning the failure areas of the specimens are presented. Finally, the paper graphically shows the effects of the type of the reinforcement on the dynamical characteristics obtained in Charpy test. The work also analyses the effects of the number of layers made of glass woven fabrics on the failure energy.