Degree Type
Thesis
Date of Award
2000
Degree Name
Master of Science
Department
Electrical and Computer Engineering
First Advisor
Lalita Udpa
Abstract
Magneto-optic eddy current imaging (MOl) systems have shown considerable promise in detecting both surface and subsurface corrosion and cracking of aging aircraft. MOl systems can produce real-time analog images of inspected parts, image both surface breaking and subsurface cracks without removing paint or decal. The images are easy to interpret, which in turn reduces inspection time and labor. Improvements and innovations in probe design are constantly required for detecting smaller and smaller flaws in complex multi-layer aircraft structures. Crucial for such studies is the development of a numerical model for simulating the underlying physical process, which can help in making more informed design optimization decisions. This thesis presents the development of a FEM for predicting quantitative values of the fields detected using MO imaging systems. The model is used extensively to study the effect of parametric variations on the field values. The results demonstrate the usefulness of the finite element model not only in understanding the capabilities of the instrument, but also in identifying optimal test parameters, and development of image interpretation algorithms.
DOI
https://doi.org/10.31274/rtd-180813-5924
Publisher
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu
Copyright Owner
Chao Chen
Copyright Date
2000
Language
en
Date Available
2013-11-20
File Format
application/pdf
Recommended Citation
Chen, Chao, "Finite element modeling of MOI for NDE applications" (2000). Retrospective Theses and Dissertations. 220.
https://lib.dr.iastate.edu/rtd/220
