Patents by Inventor Defeng Mo

Defeng Mo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Systems and methods to predict fatigue lives of aluminum alloys under multiaxial loading
    Patent number: 8515688
    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.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: August 20, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Qigui Wang, Yucong Wang, Guoqiu He, Chengshu Chen, Zhengfei Hu, Xiaoshan Liu, Defeng Mo
  • SYSTEMS AND METHODS TO PREDICT FATIGUE LIVES OF ALUMINUM ALLOYS UNDER MULTIAXIAL LOADING
    Publication number: 20100235110
    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.
    Type: Application
    Filed: March 12, 2009
    Publication date: September 16, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Qigui Wang, Yucong Wang, Guoqiu He, Chengshu Chen, Zhengfei Hu, Xiaoshan Liu, Defeng Mo