Effect of an Angle-Ply Orientation on Tensile Properties of Kevlar/glass Hybrid Composites

Hybrid composites are considered materials of great potential for engineering applications. One advantage of hybrid composite materials for the designer is that the properties of a composite can be controlled to a considerable extent by the choice of fibers and matrix and by adjusting the orientation of the fiber. The scope for this tailoring of the properties of the material is much greater, however, when different kinds of fiber orientations are incorporated in the same resin matrix. For the study of potential of these materials, in this work specimens were prepared with different angle ply orientation of kevlar/glass hybrid with epoxy resin as an adhesive. Three orientations viz 0 /90 , 45 /45 and 30 /60 were considered for studies. Mechanical properties such as tensile strength, tensile modulus, & peak load of the hybrid composites were determined as per ASTM standards. Vacuum bagging technique was adopted for the fabrication of hybrid specimens. It was observed that angle ply orientation at 0 /90 showed significant increase in tensile properties as compared to other orientation. Finally, the failure analysis of hybrid composites is also discussed.