Abstract
Dynamic toughness of ceramic matrix composites is evaluated by instrumented Charpy impact testing. Assuming ceramic composites to be damageable elastic materials and utilizing a procedure based on a dynamic analysis of the notched bending specimen responses, various fracture parameters are studied. Dynamic toughness K Id , derived from fracture initiation and dynamic crack growth resistance curves are used to characterize the dynamic toughness of various 2D and 3D ceramic matrix composites. Significant differences in R curves are correlated with the fibrous structure and the component nature of the composites. The usefulness of impact testing at moderate deformation speed is established.
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