DAVID LOWELL DOWNEY
Pilots at Belle Ln, Harleysville, PA
License number
Pennsylvania A0497022
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
423 Belle Ln, Harleysville, PA 19438
Professional information
Method And Apparatus For Failure Probability Density Function Determination
US Patent:
7509873, Mar 31, 2009
Filed:
Dec 22, 2006
Appl. No.:
11/615921
Inventors:
Sharyn E. Mlinar - Wilmington DE, US
Matthew H. Cawthorne - Newton Square PA, US
David L. Downey - Harleysville PA, US
Donna M. Irby - New Castelle DE, US
Matthew H. Cawthorne - Newton Square PA, US
David L. Downey - Harleysville PA, US
Donna M. Irby - New Castelle DE, US
Assignee:
The Boeing Company - Chicago IL
International Classification:
G01N 3/32
US Classification:
73811, 73788, 73802
Abstract:
A coupon fabrication with defined distortion in the form of marceled fibers and test protocol is employed to determine the shape of the failure probability density curve to improve the analyses of the risk of fiber distortion anomalies in composite structures. This protocol provides a method to determine the probability of and the severity of the various distorted fiber conditions that might exist on composite structure in fabrication and in service. A distortion characterization matrix is established for determining test shapes and providing defect characterization based on the results of tests on the selected shapes. Coupons for test are created using resin pool.