Modeling and Predicting Fatigue Life for Contact Loading

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The method for predicting fatigue life in components currently involves destructive testing under service loading. This process requires expensive equipment, extensive labor, and lengthy testing times.

Purdue University researchers have developed a method to help reduce the very costly and destructive testing that is associated with fatigue life prediction. This invention incorporates a new method for selecting machining conditions for hard turning processes based on measured and/or predicted residual stress distributions and other variables. These properties are essential inputs for building models that can predict fatigue life, which can be based on the concept of crack propagation. Ultimately, this method can be used to predict the fatigue life and processing conditions for many finishing processes, such as shot peening, and can be applied to through-hardened and case-hardened metals.

Advantages:
-More cost-effective fatigue life testing
-Nondestructive testing method

Potential Applications:
-Materials
-Manufacturing
-Tooling
Mar 14, 2003
United States
7,117,574
Oct 10, 2006

Mar 15, 2002
Provisional-Patent
United States
(None)
(None)
Purdue Office of Technology Commercialization
1801 Newman Road
West Lafayette, IN 47906

Phone: (765) 588-3475
Fax: (765) 463-3486
Email: otcip@prf.org