태핑음을 이용한 복합재 구조물의 손상탐지

The tapping test has simplicity of procedure for detection of the damage in aircraft structure. However, the result of tapping test depends on the subjective experience of inspector. In this paper, more objective tapping test has proposed. The tapping sounds are used as reference data to evaluate the damage. The WT(wavelet transform) is used to decompose the test data. From the results, we could know that high frequency components of force and sound are reduced due to delamination in composite laminate. On these results, the tapping sound caused by tapping could be used for the reference data to evaluate the delamination in composite structure.