April 15, 2011
12:00 PM – 1:00 PM
EA -126
Civil and Environmental Engineering
All are invited to attend
Pizza will be served
Civil and Environmental Seminar Series
STRUCTURAL HEALTH MONITORING IN CIVIL ENGINEERING BY ULTRASONIC GUIDED WAVES
Abstract
Ultrasonic Guided Waves (UGWs) provide a highly efficient method for the Non-Destructive Evaluation (NDE) and the Structural Health Monitoring (SHM) of structural components with uniform cross sections (waveguides).
The seminar will focus on 1) the numerical predictions of ultrasonic guided waves propagation in complex structural components and 2) the results of several experimental and field tests performed by the author. The numerical simulations presented are based on a Semi-Analytical Finite Element (SAFE) method. The numerical approach is able to model efficiently waves in waveguides of arbitrary cross-section, with a large number of layers and accounting for viscoelastic material damping. Wave velocities, attenuation, cross-sectional mode shapes and response to arbitrary excitations have been predicted for a broad range of cases. These solutions are essential in the interpretation of experimental results and are necessary to develop a Structural Health Monitoring strategy based on UGWs.
Some relevant applications will be presented such as high speed defect detection in railroad tracks, stress monitoring and damage location in tendons of post tensioned concrete structures and impact location/identification in composite structural components.
Bio
Ivan Bartoli received his Laurea Degree in Civil Engineering from the University of Bologna, Italy in 2001. From 2001 to 2002 he worked as a researcher at the Civil Engineering Department of the University of Bologna (Italy). In 2003 he moved to the Structural Engineering Department of the University of California, San Diego where he earned an M.S. degree in 2005, a Ph.D. degree in 2007 and he worked as Assistant Project Scientist until Sept 2010. Dr. Bartoli has recently joined the Department of Civil Architectural and Environmental Engineering at Drexel University. His areas of expertise include dynamics and vibrations of structural components, and ultrasonic guided waves for Non-Destructive Evaluation and Structural Health Monitoring of civil structures. He has developed novel techniques for dynamic testing of civil and aerospace structures, signal processing strategies, and analytical/numerical modeling of ultrasonic guided wave propagation. His research activity has produced over 20 journal articles and several conference papers. In 2006, Bartoli has received the American Society for Nondestructive Testing Research Fellowship.
http://www.temple.edu/engineering/CEE/upcoming_seminars.html
Department of Civil and Environmental Engineering
Temple University
Chair: Michel C. Boufadel, PhD, PE
1947 N.12th Street
Philadelphia, PA 19122
(215) 204-7814
ceed@temple.edu
www.temple.edu/engineering/cee
“Attention to Professional Engineers (P.E.): our seminar is eligible for 1.0 PDH (professional development hour). For those who want a certificate, please contact us at: ceed@temple.edu, and put PDH certificate for seminar at subject line.”
