This paper presents the analysis of active piezoelectric patches for cracked structures byBoundary Element Method. A two dimensional boundary integral formulation based on themultidomain technique is used to model cracks and to assemble the multi-layered piezoelectricpatches to the host damaged structures. The fracture mechanics behavior of the repaired structuresis analyzed for both perfect and imperfect interface between patches and host beams. The imperfectinterface, representing the adhesive between two different layers, is modeled by using a “SpringModel” that involves linear relationships between the interface tractions, in normal and tangentialdirections, and the respective discontinuity in displacements. Numerical analyses performed on acracked cantilever beam repaired by single and multilayered patches are presented. It is pointed outthat the adhesive deeply influences the performances of the repair as highlighted by an increasing ofthe SIF’s values with respect to perfect bonding case.
|Number of pages||6|
|Publication status||Published - 2008|