SYMPOSIA PAPER Published: 01 January 1977
STP26932S

Fracture Resistance Characterization of Graphite/Epoxy Composites

Source

The resistance method has been applied to graphite/epoxy composites. The method is based on the assumption that the damage growth at the crack tip can be modeled as a self-similar crack extension through compliance matching. Experimental data for center-cracked tension specimens reveal a linear relationship between crack-growth resistance and initial crack length. For the [0/±45]s laminate, the effective increment of crack length at fracture and the corresponding crack-growth resistance essentially are independent of initial crack length. The average amount of this crack extension in the [0/±45]2s and [0/±45]s laminates is higher than the values obtained from a best fit of fracture strength data reported in the literature. However, the present method results in an improved prediction of fracture strength for the [0/90/ ±45]s laminate.

Author Information

Morris, DH
Mississippi State University, Mississippi State, Miss.
Hahn, HT
University of Dayton Research Institute, Dayton, Ohio
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Details
Developed by Committee: D30
Pages: 5–17
DOI: 10.1520/STP26932S
ISBN-EB: 978-0-8031-4690-7
ISBN-13: 978-0-8031-4490-3