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FAILURE PREDICTION OF COMPLEX STRUCTURES UNDER ARBITRARY TIME-SERIAL LOADING CONDITION

United States Patent Application

20110054840
A1
View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A method and apparatus for the nonlinear detection of imminent failure in a complex structural element is disclosed. The method and apparatus include sensing stress and strain displacement-related data for said structural element, analyzing the sensed stress and strain displacement-related data as a function of one or more principle components, generating a crack-growth rate function relating said data for each principle component over a load/unload cycle, determining a total crack-growth rate function based on at least one crack-growth rate function, deriving from said total crack-growth rate function at least one indicator function, monitoring trends in said at least one indicator function, and providing an indication when said monitoring detects an end-stage trend in said at least one indicator function.
Hively, Lee M. (Philadelphia, TN), Abercrombie, Robert K. (Knoxville, TN), Sheldon, Fredrick T. (Knoxville, TN)
12/ 548,206
August 26, 2009
STATEMENT OF GOVERNMENT RIGHTS [0009] This invention was made with Government support under Contract Number DE-AC05-00OR22725 awarded by the United States Department of Energy, and the United States Government has certain rights in this invention.