Abstract
The effects of fiber spacing and fiber volume fraction on void nucleation in short-fiber composites are investigated through calculations based on a continuum model for interface decohesion. Using material parameters that simulate Al-SiC short-fiber composites, it is found that the stress and strain levels at which debonding occurs is strongly dependent on fiber spacing and volume fraction. In addition, fiber spacing also affects the mode of debonding at fiber ends. The results provide insight into the effects of controllable microstructural parameters on damage mechanisms that ultimately cause composite failure.
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