Experimental Structural and Dynamic Analysis of Delaminated Fibre Reinforced Polymer Beam

Abstract

The phenomenon of Delamination is common in composite beams as the composite beams are having laminate structures. Delamination leads to development of cracks and reduces the strength of the material.

Delamination is a mode of failure for composite materials. Modes of failure are also known as ‘Failure Mechanisms'. In laminated materials, repeated cyclic stresses, impact, and so on can Cause layers to separate, forming a mica-like structure of separate layers, with significant loss of mechanical toughness. Some manufacturers of carbon composite bike frames suggest to dispose of the expensive frame after a particularly bad crash, because the impact could develop defects inside the material. Due to increasing use of composite materials in aviation, delamination is increasingly an air safety concern, especially in the tail sections of the airplanes.

 In this thesis, the effects of delamination length on the stresses and fractural effect of symmetric Fiber reinforced polymer beams are analyzed using Ansys software. The composite material considered is S-Glass. Structural and modal analysis is done on the FRP beam by varying the delamination length with same thickness.