Moisture Determination in Composite Materials Using Positron Lifetime Technique.
Abstract
Fiber-reinforced resin-matrix composites reportedly suffer significant degradation in their mechanical properties when they are exposed to hot, moist environments for extended periods. Moisture weakens the fiber-matrix bond as well as the matrix shear strength. Despite the importance of measuring moisture content and its effects on composite material properties, not enough data are available on suitable nondestructive techniques for detecting and measuring moisture diffusion in resin-matrix composite materials. This paper addresses the problem of measuring the moisture content of such materials, using the positron lifetime technique. (AN)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1980
- Accession Number
- ADA306025
Entities
People
- Jag J. Singh
- William H. Holt
- Willis Mock Jr.
Organizations
- Langley Research Center