Structure Health Monitoring (SHM)

Structural Health Monitoring (SHM)

BuildingsBridgesWind TurbinesHelicoptersIndustrial EquipmentAero planesApplication: Practically any critical structureReal-time assessment of the state of health (e.g., damage) of instrumented structures from measurementsImproves safety and reliability of structureStructural Health Monitoring (SHM)Share similarities with non-destructive evaluation (NDE) and smart materials and structures (SMS) conceptsAnalogous to Human Nervous System

Source: H. Specmann en R. Henrich, AirbusSHMStructuresNDEMaterialsPassive vs Active SHMActive SHMPassive SHM

Sensors/ActuatorsDetectionDiagnosticsPrognosticsSHMDesignManufacturingIn-serviceMaintenanceSaferReliableAgileMaintainableCourtesy: Prof. Fu-Kyu ChangPassive vs Active SHMMethods and SensorsSHM MethodsHigh frequency wave propagationAcoustic emissionStatic strainsOthersLamb wavesStatic/dynamic displacementsVibration analysisSensor technologyPZT FBG OthersPZT FBG Others< Aerospace engineering >< Civil engineering >Courtesy: Structural health monitoring by D. Balageas, 2006, iSTEPZT FBG OthersPZT FBG OthersAerospace engineeringCivil engineeringTypical SensorsPZT and FBG Sensors

Maintenance CostIntervalI SHMI CISHMConventional InspectionoperationalMaintenance BenefitIntervalISHMoperationalCISHMCIDesign BenefitPerformance EfficiencyFigures from H. Schmidt, Airbus

DesignManufacturingIn-serviceMaintenanceSHMSensingDetectionDiagnosticsPrognosticsDesign optimizationSaferReliableAgileMaintainableMonitored structureActionSurroundingenvironmentEmbedded actuatorEmbedded sensorInformationInteraction

Monitored structureSurroundingenvironmentEmbedded sensorInformationInteraction

DesignManufacturingIn-serviceMaintenanceSHMSensingDetectionDiagnosticsPrognosticsDesign optimizationSaferReliableAgileMaintainableComponents of SHM damage detection is there damage? damage localization whre is the damage? damage quantification how severe? damage prognosis future predictionShare similarities with non-destructive evaluation (NDE) and smart materials and structures (SMS) conceptsSHMStructuresNDEMaterialsWhat Is Structural Health Monitoring (SHM)?

Structural integrity assessment for buildings, bridges, offshore rigs, vehicles, aerospace structures etc. Goals of SHM are: damage detection is there damage? damage localization where is the damage? damage quantification how severe? damage prognosis future prediction

Sensors/ActuatorsDetectionDiagnosticsPrognostics (Decision Making)SHM

Distributed sensor network (i.e. nervous system) for SHM of an airplane structure integrityTaken from www.compositesworld.comSHMStructuresNDEMaterials-=

Evaluation