Crack Nucleation Concept Study.
BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD
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A crack nucleation model presented in this paper is based on two principal ideas. First, there is a flaw distribution in the material which can be characterized as to size, orientation, type or other perhaps unknown critical parameter. Secondly, when the stress reaches a critical value given by a Griffith-type condition, the flaw under consideration begins to grow and is considered nucleated. This model has two implications 1 applied stress, as well as inherent microstructure, should be taken into account in deriving nucleation rates, and 2 cracks are nucleated only on the rising portion of the stress wave. Author
- Solid State Physics