FATIGUE BEHAVIOUR OF POLYURETHANE CORE SANDWICHED GLASS REINFORCED IN EPOXY MATRIX COMPOSITE MATERIAL

Abstract: In this project flexural fatigue behaviour Polyurethane core sandwiched in glass/ epoxy composite laminate structures is studied. The effect of face sheet thickness and core thickness on the flexural fatigue is studied by testing the sandwich structures in computer controlled universal fatigue testing machine. The effect of core thickness and facesheet thickness on flexural strength of sandwich structures is also studied. From the experimental results of fatigue testing, it is observed that, Polyurethane core sandwiched in glass/ epoxy composite laminate structures have more than 2500000 cycles of fatigue life at 80 % of loading. The result of ANOVA on flexural strength reveals that, face sheet thickness is most significant parameter.

Keywords: E-glass fiber, epoxy resin, Sandwich structures, ANOVA, Fatigue life.