NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Real-Time Radiographic In-Situ Characterization Of Ply Lift In Composite Aerospace MaterialsThe problem of ply lifting in composite materials is a significant issue for various aerospace and military applications. A fundamental element in the prevention or mitigation of ply lift is determination of the timing of the ply lifting event during exposure of the composite material to flight conditions. The Marshall Space Flight Center s Nondestructive Evaluation Team developed a real-time radiographic technique for the detection of ply lift in carbon phenolic ablative materials in situ during live firings of subscale test motors in support of NASA s Reusable Solid Rocket Motor program, using amorphous silicon detector panels. The radiographic method has successfully detected ply lifting in seven consecutive carbon phenolic converging cones attached to solid fuel torches, providing the time of ply lift initiation in each test. Post-processing of the radiographic images improved the accuracy of timing measurements and allowed measurement of the ply lifting height as a function of time. Radiographic data correlated well with independent pressure and temperature measurements that indicate the onset of ply lift in the nozzle material.
Document ID
20060024657
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Beshears, Ronald D.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Doering, Edward R.
(Rose-Hulman Inst. of Tech. Terre Haute, IN, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2006
Subject Category
Composite Materials
Meeting Information
Meeting: National Space and Missile Materials Symposium
Location: Orlando, FL
Country: United States
Start Date: June 26, 2006
End Date: June 30, 2006
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available