Patents by Inventor Bogdan R. Krasnowski

Bogdan R. Krasnowski 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).

  • Publication number: 20200333228
    Abstract: A notch treatment method for flaw simulation including providing the specimen with the notch, the notch having a re-melt material layer; isolating the notch; and selectively etching the notch to provide an etched surface of the notch; wherein at least a portion of the re-melt material layer has been removed from the notch. In one aspect, there is provided a notch treatment method for flaw simulation including providing the specimen with the notch, the notch having a re-melt material layer, the specimen includes steel or an alloy thereof; isolating the notch; and selectively etching the notch with a first etching solution and a second etching solution to provide an etched surface on the notch; wherein at least a portion of the re-melt material layer has been removed from the notch.
    Type: Application
    Filed: June 26, 2020
    Publication date: October 22, 2020
    Applicant: Bell Textron Inc.
    Inventors: Xiaoming Li, Bogdan R. Krasnowski, Robert A. Figueroa, Robert Wardlaw
  • Patent number: 10732085
    Abstract: A notch treatment method for flaw simulation including providing the specimen with the notch, the notch having a re-melt material layer; isolating the notch; and selectively etching the notch to provide an etched surface of the notch; wherein at least a portion of the re-melt material layer has been removed from the notch. In one aspect, there is provided a notch treatment method for flaw simulation including providing the specimen with the notch, the notch having a re-melt material layer, the specimen includes steel or an alloy thereof; isolating the notch; and selectively etching the notch with a first etching solution and a second etching solution to provide an etched surface on the notch; wherein at least a portion of the re-melt material layer has been removed from the notch.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: August 4, 2020
    Assignee: Bell Helicopter Textron Inc.
    Inventors: Xiaoming Li, Bogdan R. Krasnowski, Robert A. Figueroa, Robert Wardlaw
  • Publication number: 20200025661
    Abstract: A notch treatment method for flaw simulation including providing the specimen with the notch, the notch having a re-melt material layer; isolating the notch; and selectively etching the notch to provide an etched surface of the notch; wherein at least a portion of the re-melt material layer has been removed from the notch. In one aspect, there is provided a notch treatment method for flaw simulation including providing the specimen with the notch, the notch having a re-melt material layer, the specimen includes steel or an alloy thereof; isolating the notch; and selectively etching the notch with a first etching solution and a second etching solution to provide an etched surface on the notch; wherein at least a portion of the re-melt material layer has been removed from the notch.
    Type: Application
    Filed: September 7, 2018
    Publication date: January 23, 2020
    Applicant: Bell Helicopter Textron Inc.
    Inventors: Xiaoming Li, Bogdan R. Krasnowski, Robert A. Figueroa, Robert Wardlaw
  • Publication number: 20190003944
    Abstract: A method for defining a threshold stress curve utilized in fatigue and/or damage tolerance analysis, the method including conducting a direct test method on a plurality of specimens with a notch to generate raw data, the notch in each of the specimens having a notch dimension; determining a plurality of analyzed data points based upon the raw data; determining a regression line based upon the plurality of data points, the regression line including an exponential portion and a power law portion; and connecting the exponential portion and the power law portion of the regression line to form a threshold stress curve based on the regression line.
    Type: Application
    Filed: September 7, 2018
    Publication date: January 3, 2019
    Applicant: Bell Helicopter Textron Inc.
    Inventors: Xiaoming Li, Bogdan R. Krasnowski
  • Patent number: 10094751
    Abstract: A method of determining damage tolerance allowables in a specimen, the method includes applying a cyclic load to a specimen until a first crack emanates from a notch in the specimen, the cyclic load having a maximum load and a minimum load. The method also includes applying a subsequent cyclic load to the specimen until the first crack grows to form a second crack emanating from the first crack, the subsequent cyclic load having the same maximum load but a greater minimum load.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: October 9, 2018
    Assignee: Bell Helicopter Textron Inc.
    Inventors: Xiaoming Li, Bogdan R. Krasnowski
  • Publication number: 20160282244
    Abstract: A method of determining damage tolerance allowables in a specimen, the method includes applying a cyclic load to a specimen until a first crack emanates from a notch in the specimen, the cyclic load having a maximum load and a minimum load. The method also includes applying a subsequent cyclic load to the specimen until the first crack grows to form a second crack emanating from the first crack, the subsequent cyclic load having the same maximum load but a lesser minimum load.
    Type: Application
    Filed: March 24, 2016
    Publication date: September 29, 2016
    Inventors: Xiaoming Li, Bogdan R. Krasnowski