The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 2006
Filed:
Mar. 14, 2003
Chunghorng R. Liu, West Lafayette, IN (US);
Salah Ramadan Agha, Gaza Strip, IL;
Chunghorng R. Liu, West Lafayette, IN (US);
Salah Ramadan Agha, Gaza Strip, IL;
Purdue Research Foundation, West Lafayette, IN (US);
Abstract
A method of determining expected fatigue life of machined bearing races or other components wherein a hardened surface of each bearing race is machined to provide a machined surface including the steps of determining hardness distribution and residual stress distribution along a depth into the machined surface as a function of cutting parameters, determining a relationship of expected fatigue life of the machined bearing races as a function of the hardness distribution and the residual stress distribution using a fracture mechanics model, and determining expected fatigue life from the relationship using actual cutting parameters employed in machining the hardened surface of the bearing races. Cutting conditions to optimize fatigue life can be selected based on the expected fatigue life.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile