Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 26
Book Description
Edge Crack Growth of Thermally Aged Graphite/polyimide Composites
Author: Edge Crack Growth of Thermally Aged Graphite/Polyimide Composites
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781724298126
Category :
Languages : en
Pages : 28
Book Description
Laminates of Celion 6000/LARC-160 and Celion 6000/PMR-15 graphite/polyimide composite materials were aged in air at temperatures of 202, 232, 260 and 288 C for various times up to 15,000 hours. Three unidirectional specimen types were studied: short beam shear (SBS), flexure, and 153 mm square panels. The interior region of the square panels exhibited little or no property degradation, whereas both laminate materials degraded and cracked preferentially at the specimen edge perpendicular to the fibers. Using a dye penetrant, the specimens were X-rayed and the crack depth measured as a function of time and temperature. A time temperature superposition of the crack data was successfully performed using an Arrhenius form for the shift factor. A direct correlation was found for edge crack depth and SBS strength for the LARC-160 laminates but the correlation for PMR-15 laminates was more complex. Nelson, J. B. Langley Research Center NASA-TM-85763, NAS 1.15:85763 RTOP 505-33-33-01
Long-term Thermal Aging of Two Graphite/polyimide Composite Materials
Author: James B. NelsonPublisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 32
Book Description
Long-term Thermal Aging of 2 Graphite-polyimide Composite Materials
Author: Scientific and Technical Aerospace Reports
Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 488
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
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