PROGRAMMABLE REFLECTANCE OF ARTIFICIAL FLAWS IN RAIL MATERIALS

Award Information
Agency:
Department of Transportation
Branch
n/a
Amount:
$50,000.00
Award Year:
1987
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
6903
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Reinhart & Assocs Inc
Po Box 9802-173, Austin, TX, 78766
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
RONALD E LARSEN
PH D SENIOR RESEARCH SCIENTIST
() -
Business Contact:
() -
Research Institution:
n/a
Abstract
A PROGRAMMABLE DEFECT SIMULATOR IS NEEDED TO TEST ULTRASONIC RAIL FLAW DETECTION SYSTEMS. CALIBRATION STANDARDS CAN BE DEVELOPED WITH VARIABLE PHYSICAL CHARACTERISTICS ACCORDING TO A PREDESCRIBED SCHEME THAT SIMULATES COMMONLY-OCCURRING FLAWS (CROSS-HEAD FATIGUE CRACKS) IN RAILWAY SYSTEM RAILS. THIS PROJECT WOULD DEVELOP A METHOD OF ALTERING THE EFFECTIVE REFLECTIVITY OF A SOLID-GAS INTERFACE THROUGH THE INTRODUCTION OF A FLUSH-MOUNTED ARRAY OF CLOSE-PACKED SOLID STEEL BACKING MEMBERS WHOSE INTIMACY OF COUPLING IS PROGRAMMED FOR CONTROLLED PRESSURE VARIATIONS INDUCED THROUGH THE USE OF PIEZOELECTRIC OR MAGNETOSTRICTIVE DEVICES. A LARGE VARIETY OF REFLECTOR SHAPES WITH VARYING DEGREES OF INTERFACE TRANSMISSIVITY CORRESPONDING TO PARTIALLY CLOSED FATIGUE CRACKS WITH SHAPES (RANGING FROM SIMPLE CIRCLES TO CRESCENTS OF NUMEROUS ORIENTATIONS) CAN BESIMULATED.

* information listed above is at the time of submission.

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