Patents by Inventor Sylvie Pommier

Sylvie Pommier 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).

  • Method of determining the non-propagation threshold of fatigue cracks at high frequency
    Patent number: 9423330
    Abstract: A method of determining the non-propagation threshold of fatigue cracks at high frequency, wherein cyclic loading is exerted on at least one testpiece having an elliptical hole in a testpiece zone, the elliptical hole having a notch at one end and the testpiece being held between two rigid masses with two rigid pre-stress plates being arranged on either side of the at least one testpiece and each fastened at its two ends to the two rigid masses, which cyclic loading is at a frequency that is selected as being equal to the resonant frequency of the assembly including the testpiece, the masses, and the stress plates, so as to generate a fatigue crack from the notch, and then once it has been observed that the crack has stopped propagating, the final length of the crack is measured and a chart is used to determine the non-propagation threshold.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: August 23, 2016
    Assignees: SNECMA, TURBOMECA, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, ECOLE NORMALE SUPERIEURE DE CACHAN
    Inventors: Caroline Mary, Christophe Cluzel, Raul Fernando De Moura Pinho, Arnaud Longuet, Sylvie Pommier, Francois Vogel
  • METHOD OF DETERMINING THE NON-PROPAGATION THRESHOLD OF FATIGUE CRACKS AT HIGH FREQUENCY
    Publication number: 20150219539
    Abstract: A method of determining the non-propagation threshold of fatigue cracks at high frequency, wherein cyclic loading is exerted on at least one testpiece having an elliptical hole in a testpiece zone, the elliptical hole having a notch at one end and the testpiece being held between two rigid masses with two rigid pre-stress plates being arranged on either side of the at least one testpiece and each fastened at its two ends to the two rigid masses, which cyclic loading is at a frequency that is selected as being equal to the resonant frequency of the assembly including the testpiece, the masses, and the stress plates, so as to generate a fatigue crack from the notch, and then once it has been observed that the crack has stopped propagating, the final length of the crack is measured and a chart is used to determine the non-propagation threshold.
    Type: Application
    Filed: August 30, 2013
    Publication date: August 6, 2015
    Applicants: SNECMA, TURBOMECA, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, ECOLE NORMALE SUPERIEURE DE CACHAN
    Inventors: Caroline Mary, Christophe Cluzel, Raul Fernando De Moura Pinho, Arnaud Longuet, Sylvie Pommier, Francois Vogel