Reliability Assessment of Nondestructive Evaluation via Eddy-Current Model-Based Inversion

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$99,980.00
Award Year:
2008
Program:
SBIR
Phase:
Phase I
Contract:
FA8650-08-M-5217
Agency Tracking Number:
F081-033-0290
Solicitation Year:
2008
Solicitation Topic Code:
AF081-033
Solicitation Number:
2008.1
Small Business Information
VICTOR TECHNOLOGIES, LLC
P.O. Box 7706, Bloomington, IN, 47407
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
074529467
Principal Investigator:
HAROLD SABBAGH
President
(812) 339-8273
has@sabbagh.com
Business Contact:
Harold Sabbagh
President
(812) 339-8273
has@sabbagh.com
Research Institution:
n/a
Abstract
The reliability of nondestructive evaluation (NDE) techniques is currently determined through probability-of-detection (POD) studies that rely on measurments of actual hardware copies of representative flaws. There is now a need to eliminate the inefficiencies and expenses of this method by using model-based standards derived from sophisticated engineering computer codes, that are, in turn, derived from rigorous applications of physical theories. This proopsal applies the concept of model-based inversion that is based upon Victor Technologies' well-known eddy-current code, VIC-3D(c), to solve the problem of reliably assessing NDE techniques. We will introduce the notion of `Probability of Inversion,' and show that the classical model-assisted POD (MAPOD) becomes a simple corollary to it. Furthermore, we will develop a rigorous electromagnetic model for anisotropic media, such as Ti-6Al-4V, which is a titanium alloy that is widely used in aerospace structures and engines. With these concepts we effectively enter the `digital age' of eddy-current NDE, leaving traditional emphasis on analog instruments behind.

* information listed above is at the time of submission.

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