The coin-tap test has the ability to indicate damage in a structural element due to a localized change of stiffness. The change in vibration signature may be detected by measurement of the dynamic contact force. A coin-tap test method for discriminati...
The coin-tap test has the ability to indicate damage in a structural element due to a localized change of stiffness. The change in vibration signature may be detected by measurement of the dynamic contact force. A coin-tap test method for discriminating between measurements made on sound and delaminated structures is present. It has been shown that the characteristics of impact force histories from a structure during a tap are changed by the presence of defect beneath the surface of the structure. In this paper, an effective method has been developed for the impact response of composite plates on arbitrary impactor shape.