Thermal Degradation of Graphite/Epoxy Composite.
Abstract
The purpose of this effort was to develop visual, NDI, and residual strength correlations as a result of thermal degradation upon thick composite laminates. These investigations were performed upon dry 0.25-inch-thick, coated graphite composite (AS-1/3501-6) laminates subjected to thermal shock on one side. Exposure temperatures were 350 degrees, 400 degrees, 500 degrees, 600 degrees, 800 degrees, 1200 degrees, 1600 degrees, and 1800 degrees F. Temperature gradients were obtained from instrumental panels under no-load conditions. Thermal shocking of panels and specimens while under sustained strain (2500 microns in./in.) conditions provided comparisons of load carrying ability. Other specimens were tested for residual strength after thermal exposure. Ultrasonic examinations were performed, as was monitoring of color changes. Permanent matrix damage began to occur during a 600 degrees F exposure. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 28, 1980
- Accession Number
- ADA106425
Entities
People
- Harold L. Pritt