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:
Aug. 20, 2013
Filed:
Mar. 12, 2009
Qigui Wang, Rochester Hills, MI (US);
Yucong Wang, West Bloomfield, MI (US);
Guoqiu He, Shanghai, CN;
Chengshu Chen, Shanghai, CN;
Zhengfei HU, Shanghai, CN;
Xiaoshan Liu, Shanghai, CN;
Defeng MO, Shanghai, CN;
Qigui Wang, Rochester Hills, MI (US);
Yucong Wang, West Bloomfield, MI (US);
Guoqiu He, Shanghai, CN;
Chengshu Chen, Shanghai, CN;
Zhengfei Hu, Shanghai, CN;
Xiaoshan Liu, Shanghai, CN;
Defeng Mo, Shanghai, CN;
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A system to predict a fatigue life of an aluminum alloy is disclosed herein. The system comprises a computer-readable medium cooperative with micromechanics-based fatigue life models for cyclic multiaxial loading. The fatigue life models predict the fatigue life by processing information received by the system relating to the aluminum alloy and the stress state present in the aluminum alloy. The received information comprises at least one of: a critical shear plane, a damage factor, a hardening factor defined by at least one of a plurality of uniaxial cyclic hardening factor parameters related to probabilistics of defects and microstructure characteristics in the aluminum alloy, an additional hardening factor related to non-proportionality, and thermophysical and mechanical properties of the aluminum alloy. The defects and microstructure characteristics can be calculated using mathematical modeling of casting, solidification and heat treatment processes or by an extreme value statistics based on metallography measurements.