Burning characteristics and fiber retention of graphite/resin matrix compositesGraphite fiber reinforced resin matrix composites were subjected to controlled burning conditions to determine their burning characteristics and fiber retention properties. Two types of burning equipment were used. Small samples were burned with a natural gas fired torch to study the effects of fiber orientation and structural flaws such as holes and slits that were machined into the laminates. Larger laminate samples were burned in a Heat Release Rate Calorimeter. Unidirectional epoxy/graphite and polyimide/graphite composites and boron powder filled samples of each of the two composite systems were burn tested and exposed to a thermal radiation. The effects of fiber orientation, flaws, and boron filler additives to the resins were evaluated. A high char forming polyimide resin was no more effective in retaining graphite fibers than a low char forming epoxy resin when burning in air.
Document ID
19800047892
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Bowles, K. J. (NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1980
Subject Category
Composite Materials
Meeting Information
Meeting: Rising to the challenge of the ''80s; Annual Conference and Exhibit