SYMPOSIA PAPER Published: 01 January 1975

Stress Rupture of Glass-Epoxy Composites: Environmental and Stress Effects


This paper is concerned with the delayed fracture of composite materials under constant stress. The results of an investigation of the combined effect of an active environment (benzene) and stress on the survival life of an E-glass reinforced epoxy composite material are presented. Through the use of an appropriate failure criterion and representative median log-time to failure values, time-dependent failure surfaces were generated from data obtained when testing in (1) air and (2) benzene for the first quadrant of the stress space. These experimental results are used to extend the current kinetic theory of rate-dependent rupture to include both anisotropic and environmental effects.

Author Information

Wu, EM
Washington University, St. Louis, Mo.
Ruhmann, DC
McDonnell Douglas Astronautics Company-East, St. Louis, Mo.
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Developed by Committee: D30
Pages: 263–287
DOI: 10.1520/STP32313S
ISBN-EB: 978-0-8031-4660-0
ISBN-13: 978-0-8031-0309-2