Patents by Inventor Defu Nie

Defu Nie 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).

  • Device for testing mixed-mode fatigue crack growth rate
    Patent number: 9841364
    Abstract: A device for testing mixed-mode fatigue crack growth rate includes a plate-like specimen, and a first fixture mechanism for exerting stretch, shear and torsion actions on the specimen via a second fixture mechanism. The second fixture mechanism is used for clamping the specimen and enabling the specimen to generate a mixed-mode fatigue crack in cooperation with the first fixture mechanism. The device further comprises a fatigue crack measurement instrument for measuring and recording the length of mixed-mode fatigue crack generated on the specimen.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: December 12, 2017
    Assignee: Hefei General Machinery Research Institute
    Inventors: Xuedong Chen, Defu Nie, Zhichao Fan, Qiaoguo Wu
  • DEVICE FOR TESTING MIXED-MODE FATIGUE CRACK GROWTH RATE
    Publication number: 20160349161
    Abstract: A device for testing mixed-mode fatigue crack growth rate comprises a plate-like specimen, and a first fixture mechanism for exerting stretch, shear and torsion actions on the specimen via a second fixture mechanism; the second fixture mechanism is used for clamping the specimen and enabling the specimen to generate a mixed-mode fatigue crack in cooperation with the first fixture mechanism; the device further comprises a fatigue crack measurement instrument for measuring and recording the length of mixed-mode fatigue crack generated on the specimen.
    Type: Application
    Filed: June 4, 2014
    Publication date: December 1, 2016
    Applicant: Heifei General Machinery Research Institute
    Inventors: Xuedong Chen, Defu Nie, Zhichao Fan, Qiaoguo WU