6533b7d4fe1ef96bd12634fa
RESEARCH PRODUCT
BEM analysis of a piezoelectric structural health monitoring system for delamination detection
Calogero OrlandoAndrea AlaimoAlberto Milazzosubject
piezoelectricsMaterials scienceFracture mechanicPiezoelectric mediaStructural health monitoring DelaminationPiezoelectric devicePiezoelectricityPiezoelectric materialNon-penetration conditionFlangeStructural Healt MonitoringStructural health monitoring systems Boundary element methodmedicineFracture mechanics behaviorGeneral Materials ScienceLaminatingSettore ING-IND/04 - Costruzioni E Strutture AerospazialiBoundary element methodStrain energy release ratebusiness.industryMechanical EngineeringDelaminationComposite laminated structureStiffnessFracture mechanicsStructural engineeringBoundary element modelDamage detectionPiezoelectricityIterative methodFractureMechanics of MaterialsReciprocity (electromagnetism)DelaminationIdentification parameterStructural health monitoringmedicine.symptomStructural health monitoring (SHM)businessdescription
In the present work a piezoelectric based structural health monitoring (SHM) system is analyzed with the aim of assessing the ability of the piezoelectric patch to detect both edge and embedded delaminations proper of flange-skin composite laminated structures. he boundary element model is developed for piezoelectric solids and is implemented by taking advantage of the multidomain technique to model laminated and cracked configurations. A non-linear spring model interface is then implemented in conjunction with an iterative procedure allowing for the simulation of the finite stiffness of the bonding layers as well as of the non-penetration condition of the delamination surfaces. he dynamic behavior of the damaged structures and of the bonded piezoelectric patch is modeled by means of the dual reciprocity approach. To fully characterize the structure response the fracture mechanics behavior is studied in terms of energy release rate G and mode-mix phase angle Ψ. Finally, a damage index based on the electrical current output of the SHM system is introduced as an effective identification parameter of the flange-skin delamination occurrence. © (2014) Trans Tech Publications.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-09-01 |