Fatigue Enhanced Cold-worked Hole FECH – Analyzer

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$850,000.00
Award Year:
2007
Program:
SBIR
Phase:
Phase II
Contract:
N68335-07-C-0162
Agency Tracking Number:
N052-120-0385
Solicitation Year:
2005
Solicitation Topic Code:
N05-120
Solicitation Number:
2005.2
Small Business Information
RESODYN CORP.
130 North Main Street, Suite 600, Butte, MT, 59701
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
836287680
Principal Investigator:
Steve Galbraith
Prinicpal Investigator
(406) 497-5223
sgalbraith@resodyn.com
Business Contact:
Lawrence Farrar
President
(406) 497-5252
lcfarrar@resodyn.com
Research Institution:
n/a
Abstract
The U.S. Navy uses a cold-hole expansion method for increasing the fatigue life of primary aircraft structures at fastener locations. The derived benefit results from compressive stresses concentrated in the metal near the perimeter of the cold worked hole. The objective of this Phase II proposal is to develop portable, light weight, quality assurance tools, based upon Eddy Current technology, that can be used to determine if a hole has been properly cold worked. The proposed products will be hand held, easy to use, and fast. (Analysis time per hole will be approximately 10 seconds) The proposed product will be very cost effective when compared to alternative inspection approaches, e.g., X-Ray Diffraction. The Phase II work will be staged to develop a hole-inspection technology that has increasing levels of quality assessment capabilities: Product 1: Provides a definitive test establishing if a hole has been cold worked. Product 2: Determines if a cold worked hole is within specifications. Prototype Product 3: Maps and images the relative values of stress or strain around a cold worked hole. Products 1 and 2 (one each) will be the deliverables for the proposed Phase II work.

* information listed above is at the time of submission.

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