Identification of Material Damage Precursors Using Novel NDE and/or SHM Hardware

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$100,000.00
Award Year:
2014
Program:
SBIR
Phase:
Phase I
Contract:
W911QX-13-C-0162
Agency Tracking Number:
A131-016-0853
Solicitation Year:
2013
Solicitation Topic Code:
A13-016
Solicitation Number:
2013.1
Small Business Information
Luna Innovations Incorporated
1 Riverside Circle, Suite 400, Roanoke, VA, 24016-4962
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
627132913
Principal Investigator:
Gheorge Bunget
Principal Investigator
(434) 220-2504
bungetg@lunainc.com
Business Contact:
Maggie Hudson
Senior Contracts Administrator
(434) 483-4254
submissions305@lunainc.com
Research Institution:
n/a
Abstract
Widespread damage in aging aircraft is becoming an increasing concern as both civil and military fleet operators are extending the service lifetime of their aircraft and increasing risk of crack-like damage of aircraft components. The scientific community found that fatigue damage initiation occurs at micro-features called fatigue damage precursors (FDP). This requires that fatigue crack growth analyses address the influence of usage on FDP and eventual macro-scale crack growth. Predicting the exact fatigue life is a difficult process and fatigue life prediction based on crack length measurements can be grossly inaccurate. In addition, the appearance of these cracks typically occurs very late in fatigue life under high cycle fatigue conditions. Thus, to improve remaining useful life prediction of structural components the study of FDP is critical. In order to address this need, Luna is teaming with Arizona State University to develop advanced ultrasonic and eddy current evaluation techniques with potential application for structural health monitoring. The proposed method is based on using multi-scale modeling with combined linear and nonlinear ultrasonic parameters and eddy current measurements of electrical properties to predict the damage state and remaining service life of aircraft structural components.

* information listed above is at the time of submission.

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