Measurement of Ktip in Fiber and Whisker Composites
A direct method of measuring stress intensity factors by measuring stresses at the crack tip was used to detennine Ktip simultaneously with Kfar field in model fiber composites and whisker composites of Al2O3 matrix and SiC fibers and whiskers. The resultant relationship was Ktip=α.Kfar field+K(0). Since Ktip is the driving force for crack growth, results can be used to predict the rate of crack growth for composites.
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