Title:

Evolution of Elastic Wave Mechanics R&D from NDE (Nondestructive Evaluation) to SHM (Structural Health Monitoring)

Speaker:

Prof. Yunho Cho

Affiliation:

Pusan National University, Busan, Korea

When:

Monday, July 12, 2010 at 3:00:00 PM   Add to Calendar

Where:

Mason Building, Room 142A

Host:

Karim Sabra
karim.sabra@me.gatech.edu

Abstract

Is the field, so called Applied Mechanics fading out or till a main picture on the academic stage? This seminar addresses the value of elastic wave (wave mechanics) study from mechanics stands point to illustrate how mechanics can still play a significant role to help safety-critical issues. The bulk and guided wave mechanics is briefly introduced and followed by the theoretical and numerical modeling of the measurement scheme based on BEM/FEM and the elastodynamic reciprocity. This talk will be concluded with some leading edge NDE/SHM R&D efforts such as focused (phased array) long range inspection, non-linear acoustic feature analysis for early stage damage detection and characterization and ultrasonic tomogram for hidden area imaging etc.

Biography

Younho Cho was born in Seoul, South Korea. He received his B.S. and M.S. in Mechanical Engineering Department, Yonesi University, South Korea in 1987 and 1989, respectively. After the M.S degree in the major of Fatigue and Fracture, he came to Penn State for Ph.D. and earned Ph.D. in the major of ultrasonic NDE in the Engineering Science and Mechanics Department, Penn State in the spring of 1995. He spent a couple of years at Penn State with the appointments of Research Associate and Senior Research Associate during the tow split terms, 1995-1996 and 2003-2004, respectively. He returned back to Korea to take a tenure track position in Mechanical Engineering Department, South Korea 1996 and transferd to the School of Mechanical Engineering, Pusan National University, in the spring, 2004 where he is currently working as an associate professor and the director of WCU (World Class University) program on advanced NDE/SHM sponsored by the Korean government. He has been involved in a number of academic societies such as ASME PVP, ASNT, IEEE UFFC, KSME (Korean Society of Mechanical Engineers), KSNT (Korean Society for Nondestructive Testing) and KNS (Korean Nuclear Society) etc. He has served as a senior fellow and editorial board member of KSNT and a board members of the KSME materials/fracture division and the applied mechanics division for the past several years. In between 2003 and 2005, he also served as the technical program secretariat for ASME PVP society. His areas of interest include ultrasonic guided wave NDE/SHM with bulk and guided waves, diagonosis/prognosis, numerical modelings based on FEM/BEM, ultrasonic tomogram, non-linear acoustics and long range ultrasonic inspection. He has over 50 refereed journal papers and another 100 conference proceedings papers.