Publications | Ge[o]rges Dib

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Second harmonic generation using nonlinear ultrasonic waves have been shown to be an early indicator of possible fatigue damage in …

The Pacific Northwest National Laboratory (PNNL) is conducting confirmatory research for the U.S. Nuclear Regulatory Commission for …

Guided wave structural health monitoring uses sparse sensor networks embedded in sophisticated structures for defect detection and …

As the nation’s nuclear fleet looks to life extension, advanced reactor (AdvRx) concepts are being considered as alternatives that may …

Advanced reactor concepts include fast reactors (including sodium-cooled fast reactors), gas-cooled reactors, and molten-salt reactors. …

Computer modeling and simulation is becoming pervasive within the non-destructive evaluation (NDE) industry as a convenient tool for …

Enhanced risk monitors (ERMs) for active components in advanced reactor concepts use predictive estimates of component failure to …

The Pacific Northwest National Laboratory (PNNL) is conducting confirmatory research for the U.S. Nuclear Regulatory Commission for the …

As the United States transitions to storing used fuel from commercial nuclear reactors in interim dry storage facilities for extended …

Under certain environmental conditions, polyvinyl toluene (PVT) plastic scintillator has been observed to undergo internal fogging. …

The harsh environments in advanced reactors (AdvRx) increase the possibility of degradation of safety-critical passive components, and …

Information on advanced reactor (AdvRx) component condition and failure probability is necessary to maintaining adequate safety margins …

Ultrasonic guided wave measurements in structural health monitoring systems are affected over a long term by measurement noise, …

Laminated composite structures are susceptible to impact damage mechanisms such as disbonds and delaminations that significantly weaken …

This milestone report presents an update on the state-of-the-art review and research being conducted to identify key indicators of …

Computer modeling and simulation is becoming an essential tool for transducer design and insight into ultrasonic nondestructive …

This report describes research results to date in support of the integration and demonstration of diagnostics technologies for …

Eddy current-based techniques have been investigated for the inspection of embedded cracks under fastener heads in riveted structures. …

The requirement for reduced structural weight has driven the development of adhesively bonded joints. However, a major issue preventing …

Eddy current probes (EC) with Giant Magnetoresistive (GMR) sensors have recently emerged as a promising tool for rapid scanning of …

Fiber reinforced plastic composites are becoming widely used in vehicles and airframe structures due to their high strength to weight …

The challenge in detecting crack under fastener heads (CUF) in a multi-layered aircraft structure poses the need for advanced NDE …

Damage detection using Lead-Zirconate-Titanate (PZT) transducers for exciting guided waves was investigated. The analytical model for …

The use of wireless sensor networks in structural health monitoring can significantly increase safety and reduce manufacturing and …

Guided wave (GW) inspection systems offer the capability for online health monitoring of structures and hence the potential for …

In the application of electromagnetic nondestructive evaluation (NDE), the measured signals received by sensors are decided by the flaw …

An advanced nonlinear, non-stationary signal processing algorithm using Hilbert-Huang Transform is presented for automatic analysis of …

Automatic analysis of eddy current (EC) data has facilitated the analysis of large volumes of data generated in the inspection of steam …

Continuous structural health monitoring (SHM) uses permanently mounted sensor networks on critical locations of a structural component. …

For continuous monitoring of power-plant components, the use of in-situ sensors (i.e., sensors that are permanently mounted on the …