ELECTROMAGNETIC DETECTION OF STRESS AND CRACK PROPAGATION IN CRITICAL AIRCRAFT COMPONENTS

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$480,554.00
Award Year:
1985
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
102
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
American Research Corp Of Va
642 First Street, P.O. Box 3406, Radford, VA, 24143
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
() -
Business Contact:
Dr. R.J. Churchill
(703) 731-0655
Research Institution:
n/a
Abstract
NON-DESTRUCTIVE TESTING RESEARCH HAS BEEN PRIMARILY CONCEREND WITH DEFECT DETECTION AND CHARACTERIZATION WITH RELATIVELY LITTLE EFFORT ON NDT TECHIQUES FOR MEASURING STRESS, PREDICTING FATIGUE DAMAGE PRIOR TO CRACKING AND MONITORING OF CRACK PROPAGATION IN CRITICAL AIRCRAFT COMPONENTS. THESE PROBLEMS ARE OF SIGNIFICANCE TO THE AIRCRAFT INDUSTRY AND TO THE NAVY BECAUSE OF THE POTENTIAL FAILURE DUE TO STRESS CORROSION CRACKING, INTER- GRANULR ATTACK, THERMAL SHOCK AND OTHER SERVICE INDUCED MODES. THIS PROGRAM DETECTION AND MEASUREMENT OF STRESS AND CRACK PROPAGATION IN FERROMAGNETIC AND NON-FERROMAGNETIC MATERIALS. INITIALLY, CONVENTIONAL EDDY CURRENT PROBES WILL BE USED TO DETECT IMPEDANCE CHANGES AS MATERIALS ARE MECHANICALLY LOADED IN A MATERIAL TESTING MACHINE. A MAJOR OBJECTIVE OF THE RESEARCH WILL BE THE CORELATION OF PROBE IMPEDANCE CHANGES WITH BOTH STRESS LEVEL AND CRACK GROWTH. IN ADDITION, SEVERAL LESS-CONVENTIONAL ELECTROMAGNETIC MEASURING TECHNIQUES WILL BE INVESTIGATED. SUCCESSFUL COMPLETION OF THE PROJECT OBJECTIVES WILL PROVIDE THE AIRCRAFT INDUSTRY WITH A COST- EFFECTIVE, RELIABLE METHOD OF DETERMINING BOTH STRESS LEVELS AND CRACK GROWTH IN CRITICAL AIRCRAFT COMPONENTS.

* information listed above is at the time of submission.

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