Representation of Matrix/Interface-Controlled Strength of Unidirectional Composites.
Final rept. 1 May 76-31 Dec 77,
AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO
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The report presents a method of characterizing the matrixinterface-controlled strength, including scatter, of unidirectional composites under combined loading. The failure envelope is represented by a second order polynomial and the scatter is described by the strength vector whose magnitude has a Weibull distriubtion. The method is based on the assumption of failure originating at inherent cracks parallel to the fibers and holds promise as a means of accounting for the size effect under combined loading. In addition, the energy release rate approach is discussed as a physical model and the appropriate data are presented. Author
- Laminates and Composite Materials
- Statistics and Probability