Results are presented for the compressive fracture strength of several Gr/Ep (AS/3501-5) laminates containing countersunk holes with both loaded and unloaded fasteners in place. Finite element stress analyses are presented which approximate the countersink geometry and the elastic contact problem. The average stress failure criterion is successfully used to predict the observed strengths in all cases considered.
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References
1.
J.M. Whitney and R.J. Nuismer, "Stress Fracture Criteria for Laminated Composites Containing Stress Concentrations," J. Composite Materials, Vol. 8 (1974), p. 253.
2.
R.J. Nuismer and J.M. Whitney, "Uniaxial Failure of Composite Laminates Containing Stress Concentrations ," ASTM-STP 593, American Society for Testing Materials , 1975, p. 117.
3.
J.M. Whitney and R.Y. Kim, "Effect of Stacking Sequence on the Notched Strength of Laminated Composites ," presented at the ASTM 4th National Conference on Composite Materials: Testing and Design, Valley Forge, PA, May 3-4, 1976.
4.
D.H. Morris and H.T. Hahn, "Mixed-Mode Fracture of Graphite/Epoxy Composites: Fracture Strength ," J. Composite Materials, Vol. 11 (1977), p. 124.
5.
R.J. Nuismer and J.D. Labor, "Applications of the Average Stress Failure Criterion: Part I — Tension," J. Composite Materials , Vol. 12 (1978), p. 238.
6.
G.P. Sendeckyj and M.D. Richardson , "Fatigue Behavior of a Graphite-Epoxy Laminate Loaded through an Interference-Fit Pin," Proceedings of the Second Air Force Conference on Fibrous Composites in Flight Vehicle Design, AFFDL-TR-74-103, September 1974, p. 469.
