ISSN: 0884-6804
Page Count: 7

The Strength Prediction of Composite Laminates Containing a Circular Hole
Reifsnider, KL

El-Zein, MS
Graduate research assistant and Reynolds metals professor, Materials Response Group, Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, VA

Abstract

The notched tensile strength of composite laminates was examined. The behavior and prediction of unidirectional off-axis, angle ply, and [0/ ± θ]^s laminates is discussed. It was found that good predictions for off-axis laminates can be obtained since the same failure mode occurs in such laminates. Similar results were also obtained for the [0/ ± θ]^s laminates. However, for angle-ply laminates, accurate predictions were not achieved because of the diversity of failure modes among the configurations tested. For fiber dominated laminates, a method for determining the characteristic dimension for the average stress criterion is presented. Moreover, the notched strength of quasi-isotropic composite laminates loaded at an angle φ to the material x axis was investigated. Good correlation between experimental and predicted values was obtained.

Keywords:
strength prediction, tensile strength, composite laminates, cracks, stress

Paper ID: CTR10174J
DOI: 10.1520/CTR10174J
ASTM International is a member of CrossRef.