Some Anomalies Associated with Moisture Diffusion in Epoxy Matrix Composite Materials

JM Whitney; CE Browning

doi:10.1520/STP34857S

SYMPOSIA PAPER Published: 01 January 1978

STP34857S

Some Anomalies Associated with Moisture Diffusion in Epoxy Matrix Composite Materials

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Diffusion of moisture into graphite/epoxy composites was investigated and some anomalies observed. In particular, data are presented which indicate a departure from classical Fickian behavior. An apparent two-stage diffusion process is observed in both the neat epoxy resin and derived graphite/epoxy composites. Evidence is presented which suggests time-dependent matrix cracking as the mechanism associated with the two-stage diffusion process. Comparison of laminate diffusion data with unidirectional data suggests that the diffusion coefficient is stress dependent.

Author Information

Whitney, JM

Air Force Materials Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio

Browning, CE

Air Force Materials Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio

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Details

Developed by Committee: D30

Pages: 43–60

DOI: 10.1520/STP34857S

ISBN-EB: 978-0-8031-4727-0

ISBN-13: 978-0-8031-0274-3

Some Anomalies Associated with Moisture Diffusion in Epoxy Matrix Composite Materials

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