Accession Number:

AD0772985

Title:

Crack Nucleation Concept Study.

Descriptive Note:

Memorandum rept.,

Corporate Author:

BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s):

Report Date:

1973-12-01

Pagination or Media Count:

17.0

Abstract:

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

Subject Categories:

  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE