AN EDDY-CURRENT MODEL AND INVERSION ALGORITHM FOR NONDESTRUCTIVE EVALUATION OF ADVANCED COMPOSITES

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$500,000.00
Award Year:
1985
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
106
Agency Tracking Number:
106
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
2634 Round Hill Lane, Bloomington, IN, 47401
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
() -
Business Contact:
Harold A. Sabbagh
(812) 330-3446
Research Institute:
n/a
Abstract
THE PROPOSED RESEARCH PROBLEM IS TO DEVELOP A SENSOR, TOGETHER WITH A MATHEMATICAL ALGORITH, THAT WILL ALLOW THE THREE- DIMENSIONAL QUANTITATIVE EDDY-CURRENT NONDESTRUCTIVE EVALUTION OF MATERIALS AND STRUCTURES. THE APPROACH THAT WE PROPOSE IS BASED ON, AND EXTENDS WORK ON TWO-DIMENSIONAL EDDY-CURRENT NDE THAT THAT HAS ALREADY BEEN PERFORMED BY ANALYTIC, INC. THAT WORK IS BRIEFLY REVIEWED. THE TECHNICAL OBJECTIVES OF THE PROPOSED RESEARCH ARE: (1) DETERMINE SUITABILITY OF HALL-EFFECT PROBES FOR SENSING EDDY-CURRENTS, (2) DETERMINE OPTIMUM ARRAY OF HALL-EFFECT PROBES FOR THE SENSOR,(3) DETERMINE SUITABILITY OF DISTRIBUTED WINDINGS AND\OR PHASED-ARRAYS FOR SENSING, OR INDUCING, EDDY-CURRENTS, AND (4) EXTEND THE ALGORITHM FOR RECONSTRUCTING FLAWS IN TWO-DIMENSIONS TO THREE-DEMENSIONS. THESE OBJECTIVES ARE MET BY ANALYZING A MODEL SENSOR, WHICH IS DESCRIBED. THE ANALYSIS IS BASED ON CERTAIN INTEGRAL RELATIONS FOR EDDY-CURRENTS.THESE INTEGRALS ARE DERIVED FROM FUNDAMENTAL ELECTROMAGNETIC THEORY, AND ARE THE FOUNDATION AND ARE THE FOUNDATION FOR OUR INVERSION TECHNIQUE.

* information listed above is at the time of submission.

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