- Author
-
Sorathia, U.
|
Diamond, E.
- Title
- Fire/Thermal Damage Assessment in Glass/Vinyl Ester Composite Specimens. Technical Report.
- Coporate
- Naval Surface Warfare Center, Bethesda, MD
- Sponsor
- Office of Naval Research, Arlington, VA
- Report
-
CARDIVNSWC-TR-64-95/13
November 1995
21 p.
- Distribution
- Available from Defense Technical Information Center LIMITED DISTRIBUTION to authorized U.S. Government agencies
- Keywords
-
glass
|
esters
|
fire damage
|
radiogrphy
|
composite materials
- Identifiers
- damage assessment; ultrasound; infrared imaging; x-radiography
- Abstract
- In order to establish feasibility of assessing thermal damage in composite materials by non-destructive evaluation, two 3"x3"x1/2" and two 3"x1/2"x1/2"" specimens were thermally exposed to 500 degrees Fahrenheit for 90 minutes in an air circulating oven. The specimens were then subjected to examination by several NDE techniques which included (1) Ultrasound (both water immersion and gel-coupled contact techniques), (2) Microwave dielectric measurements, (3) Microwave reflectometry, (4) Infrared imaging and (5) Transmission X-radiography. Infrared imaging, microwave measurements, and ultrasound techniques have the best potential of assessing thermal damage in composite materials. Infrared and microwave techniques have an additional advantage of assessing a large area without mechanical scanning. Techniques need further refinement.