English

DTIC ADA538251: Failure Behavior of Glass and Aluminum Oxynitride (AlON) Tiles Under Spherical Indenters

The failure behavior of glass and ceramic tiles during quasi-static loading from spherical indenters is studied. The failure behavior is examined on both a micro- and macro-size scale. The former is achieved by using a small spherical diamond indenter to study the localized contact behavior, and the latter is achieved by loading large tiles to complete structural failure using a unique test configuration. The influence of tile thickness and indenter radius on the failure behavior is also examined. Information on fundamental damage mechanisms in glass and ceramic materials subjected to localized contact, including the onset of inelastic deformation and the initiation of cracks, may be meaningful in relation to screening and ranking brittle materials for failure resistance.

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