A Crack Growth Gage for Assessing Flaw Growth Potential in Structural Components.

摘要

A new concept for monitoring the potential for damage accumulation in structural materials is presented. Briefly,the method proposed is to install a preflawed gage on a critical component and to monitor its flaw growth nondestructively. The relationship between this flaw size and the potential flaw in the structure is derived using linear elastic fracture mechanics principles. Experimental flaw growth data produced by an aircraft spectrum was used to demonstrate the validity of a degenerate case of this concept. A discussion is also presented to show how this method could be implemented in fulfillment of the Mil-Std-1530requirement to track potential flaw growth.