Report Title: Advances in Structural Health Monitoring: via Ultrasonic Guided Waves
Reporter: Cliff J. Lissenden
Time: May 30, 9:00AM
Address: Room 406, No.3 teaching building, Yuquan campus, Zhejiang University
Abstract: This presentation will highlight advances made at Penn State in structural health monitoring via ultrasonic guided waves. This type of structural health monitoring (SHM) is in-situ nondestructive evaluation performed with stay-in-place sensors. In fact the earlier in life the damage can be detected, the better maintenance and operations can be planned. Success in this regard is reliant upon the sensitivity of the guided wave to damage. Therefore, proper mode and frequency selection is critical and will be the underlying theme of the presentation. Applications to be discussed include: fatigue cracks at fastener holes, piezoelectric fiber composite transducers, phased arrays, bonded joints, and detection of precursors to macroscale damage.
Cliff J. Lissenden:
Professor in Engineering Science and Mechanics Department at Pennsylvania State University
Director of Ben Franklin Center of Excellence in Structural Health Monitoring
Research:
Their research group works in the general area of SHM using ultrasonic guided waves，recent research projects focus on delaminations in composite materials, degradation of adhesively bonded joints, characterization of fatigue cracks near fastener holes, development of optimal transducers, real-time phased arrays for ultrasonic beam steering, and tomographic imaging. A current thrust is nonlinear ultrasonic guided waves for microstructure characterization.
