EXPERIMENTAL VALIDATION OF USE OF COMPOSITE MATERIAL TO RESTORE NATURAL FREQUENCIES OF EDGE CRACKED ALUMINUM CANTILEVER BEAM

Faults in machines due to vibration are of major concern in the engineering filed. The repairing efficiencies cannot be identified directly from the point of view of frequency due to the nonlinear properties of damping and mass of composite patching under dynamic conditions. Crack arise may be because of defects due to manufacturing processes and mechanical defects. Mechanical accidents, fatigue, environmental attacks are responsible for a crack in a mechanical structure. Due to the mechanical loads and environmental conditions composite materials are damaged. For this reason bonded composite repair are generally preferred. They provide enhanced stress transfer mechanisms and also joint efficiencies and aerodynamic performance. Now a day’s usage of advanced composites is increased in primary and secondary aerospace structural components. It is essential to have reliable, robust, and repeatable structural bonded repair procedures to restore damaged composite components. But this method has several scientific challenges with the current existing repair technologies. In order to optimize the patching geometry, the dimensions of composite patch were selectively extended along the platform dimensions (x and y), respectively