This work mainly focuses on the study of Vibro-thermography effect using the concept of local defect resonance on flat bottom hole (FBH) and barely visible impact damage (BVID) on two separate carbon fibre reinforced polymer samples which are fabricated using vacuum assisted resin transfer moulding (VARTM) method. The samples are excited in wide band sweep region using piezo electric transducer element which is glued to the composite sample. The maximum out of plane displacement at LDR frequency of defect (BVID) will result in more temperature increment because of both friction and viscoelastic effect which is captured through uncooled thermal camera. The temperature increment around BVID is found more compared to FBH. Multiple sweep excitation is provided over defect (FBH) to increase the viscoelastic heating. Later, numerical simulation of vibro-thermography effect in FBH and BVID is performed in COMSOL software.