Monitoring of laminated composites delamination based on electro-mechanical impedance measurement

This paper paves the way for a multi-damage monitoring system for composite structures. The final goal of this work being to design a monitoring system able to predict the damage in the composite structure under static and fatigue loading. This system will be based on the simultaneous use of measurement and damage predicting models. We describe the first step of this work, which consists in the use of electro-mechanical impedance measurement to detect delamination. An electro-mechanical model of a beam into which delamination has been introduced is presented and compared with experimental results. The influence of geometrical parameters is studied and future improvements of our method are outlined.