抄録
Composite material has been used in aircraft structure since decades ago. The main disadvantage of this material is weakness of its lamination strength. Damage, for example delamination causes stiffness degradation of structure. There are many traditional non-destructive inspection ways to inspect such damages i.e. eddy current inspection, magnetic particle inspection as well as X-Ray etc. However, those ways are not only costly but also requiring much time. Thus, cheaper and more convenient inspection method is needed. This paper presents an identification of CFRP's damage using MFC Sensor. Damage is identified by measuring the transmission of pulse wave. The experiments are performed on two CFRP plates which are undamaged or damaged plate. The latter has artificial delamination by inserting a thin Teflon into CFRP plate during its manufacture. The experiment's results show that there is a degradation of natural frequency's transmission in damaged CFRP plate comparing to undamaged one when we perform the experiment using low frequency pulse wave.
