Adaptive Cross Approximations for Eddy Current Nondestructive Evaluations

Jiming Song, Professor

Electrical and Computer Engineering,

Iowa State University, Ames, Iowa, USA

jisong@iastate.edu

Time: 9:00 am, November 23, 2021

Location: Room 405, No.3 Kechuang Building(科创楼3号405室, 文昌)

Tencent Conference ID: 848805148

Abstract: Eddy current nondestructive evaluation (NDE) involves the detection of electromagnetic field irregularities due to non-conducting inhomogeneities in an electrically conducting material such as cracks, fasteners, sharp corners/edges, multi-layered structures, etc. The eddy-current problem is formulated by the boundary integral equations (BIE) and discretized into matrix equations by the method of moments (MoM) or the boundary element method (BEM). Computational tests are performed to demonstrate the accuracy and capability of the BIE method with a complex wave number for three-dimensional objects described by a number of triangular patches. Finally, our most recent research results on developing adaptive cross approximation (ACA) to accelerate the impedance calculations for NDE applications will be presented.

Biography:

 Jiming Song received Ph.D. degree in Electrical Engineering from Michigan State University in 1993. From 1993 to 2000, he worked as a Postdoctoral Research Associate, a Research Scientist and Visiting Assistant Professor at the University of Illinois at Urbana-Champaign. From 1996 to 2000, he worked part-time as a Research Scientist at SAIC-DEMACO. Dr. Song was the principal author of the Fast Illinois Solver Code (FISC).  He was a Principal Staff Engineer/Scientist at Semiconductor Products Sector of Motorola in Tempe, Arizona before he joined Department of Electrical and Computer Engineering at Iowa State University in 2002.

Dr. Song currently is a Professor at Iowa State University’s Department of Electrical and Computer Engineering. His research has dealt with modeling and simulations of interconnects on lossy silicon and RF components, electromagnetic wave scattering using fast algorithms, the wave propagation in metamaterials, acoustic and elastic wave propagation and non-destructive evaluation, and transient electromagnetic field. He received the NSF Career Award in 2006 and is an IEEE Fellow and ACES Fellow.

Contact: Prof. Lei Zhao, leizhao@cumt.edu.cn

School of Information and Control Engineering

China University of Mining and Technology

IEEE AP-S Chapter-Xuzhou