Song, Jiming

Electromagnetic and Ultrasonic Nondestructive Evaluation (NDE)

Jiming Song

Professor
jisong@iastate.edu
(515) 294-8396

Academic Department Profile

Electromagnetic NDE

Efficient modeling tools for NDE applications using eddy current to calculate the changes in field distributions and impedances due to cracks and flaws
Semi-analytical solutions with truncated region eigenfunction expansion (TREE)

Ultrasonic NDE

Efficient simulation tools for using ultrasonic wave scattering from general 3D arbitrary shaped flaws and cracks
Accelerating computations using multilevel fast multipole algorithm (MLFMA)

Metamaterials for Antenna Applications

Model and design metamaterials and metasurfaces to increase antenna performances

Sensors for Agriculture

Model and design sensors for crop integrity by measuring impedance matrix

Computational Electromagnetics

Efficient algorithms for wave propagation and interactions with materials for scattering and radiation problems
Fast integral equation solvers such as fast multipole method (FMM), adaptive cross approximation (ACA), etc.

Keywords

Eddy current NDE, ultrasonic NDE, modeling and simulation, computational electromagnetics, fast algorithms

Recognitions, Awards & Patents

Fellow, Institute of Electrical & Electronic Engineers (IEEE)
Fellow, Applied Computational Electromagnetics Society (ACES)

Funded Research Sponsors

NSF, CNDE sponsors, Pratt & Whitney, Intel, SAIC
Air Force RL, Multiple DoD-Sponsored SBIR & STTR

op figures: Ultrasonic NDE: left: A-scan of a spherical void inside a metal; right: measured and simulated A-scan from a circular crack with oblique incidence Bottom figures: Eddy current NDE: left figure: Team Workshop Problem 15; center figure: Comparison of impedance change with coil axis position relative to the center of the rectangular slot at 900 Hz; right figure: CPU time per iteration for full matrix approach and the proposed ACA (Adaptive Cross Approximation).