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:
Dec. 23, 2008
Filed:
May. 14, 2003
Kenneth Nero Morman, Jr., West Bloomfield, MI (US);
Joanna Rakowska, Farmington Hills, MI (US);
Sheng-yuan Hsu, Novi, MI (US);
Kenneth Nero Morman, Jr., West Bloomfield, MI (US);
Joanna Rakowska, Farmington Hills, MI (US);
Sheng-Yuan Hsu, Novi, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A method has been invented for predicting the build-up of heat, material aging, and subsequent belt separation failure in rolling steel-belted pneumatic tires (). The procedure employs finite element analysis and a new fatigue crack propagation model that takes output generated by the finite element model to predict distance and time to belt separation in the tire. The finite element model uses input information on tire load, speed and inflation pressure () to calculate the temperature and energy release rate at the corresponding tips of the fatigue crack to generate four-dimensional response surfaces of crack-tip energy release rate as a function of crack length, crack-tip circumferential angular position, and crack-tip temperature. The fatigue crack propagation model samples the response surface and is numerically integrated to predict distance and/or time to belt separation failure ().