In this paper, a piezoelectric based Structural Health Monitoring (SHM) system is proposed to detect skin/stiffener debonding and delamination cracks proper of laminated composite structures. The SHM systemis analyzed by means of a boundary element code implemented in the framework of piezoelectricity. Themultidomain technique, coupled with an interface spring model, is used to model laminated compositestructures as well as the bonding between the host delaminated structure and the piezoelectric sensor.Static sensitivity analyses are firstly performed on a drop-ply delaminated structure in order to identifya suitable configuration for the sensor. Then, the dynamic electromechanical response of the damagedstructure with the bonded piezoelectric sensor is investigated. The definition of a damage index allowsan effective identification of the skin/stiffener debonding occurrence. In order to fully characterize thehost structure SHM system assembly, the fracture mechanics behavior of the structure is also studiedin terms of the total energy release rate G and of the phase angle \psi.
|Numero di pagine||13|
|Stato di pubblicazione||Published - 2013|
All Science Journal Classification (ASJC) codes