Study and analysis of mechanical and viscoelastic behavior in flexure of laminated composites

Abstract

In the present paper, seven laminated composites were the subject of an experimental study to determine their mechanical and viscoelastic properties by means of dynamic mechanical analysis in a bending configuration. The influence of the frequency, fiber type and fiber orientation on dynamic mechanical properties of different system composites were investigated. Carbon/epoxy laminates exhibit a great stiffness when fibers are oriented along the axis of the clamps, and the maximum modulus was reported for unidirectional carbon/epoxy laminate [08 plies] with 56.4 GPa. The glass transition temperature was found to decrease with the incorporation of fibers and increase with increased frequency. For the Kevlar/epoxy laminate, an increase of 12.5 8C in glass transition temperature was observed. This is related to a better interfacial adhesion between epoxy matrix and Kevlar fibers