Patents by Inventor David Pecknold

David Pecknold 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).

  • Methods and systems for modeling material behavior
    Patent number: 8095344
    Abstract: A method for modeling material behavior includes using empirical three dimensional non-uniform stress and strain data to train a self-organizing computational model such as a neural network. A laboratory device for measuring non-uniform stress and strain data from material includes an enclosure with an inclusion in it. As the enclosure is compressed, the inclusion induces a non-uniform state of stress and strain. A field testing device includes a body having a moveable section. When the body is inserted in a material and the moveable section moved, a non-uniform state of stress and strain can be characterized.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: January 10, 2012
    Assignee: The Board of Trustees of the University of Illinois
    Inventors: Jamshid Ghaboussi, Youssef M. A. Hashash, David Pecknold
  • METHODS AND SYSTEMS FOR MODELING MATERIAL BEHAVIOR
    Publication number: 20090112489
    Abstract: A method for modeling material behavior includes using empirical three dimensional non-uniform stress and strain data to train a self-organizing computational model such as a neural network. A laboratory device for measuring non-uniform stress and strain data from material includes an enclosure with an inclusion in it. As the enclosure is compressed, the inclusion induces a non-uniform state of stress and strain. A field testing device includes a body having a moveable section. When the body is inserted in a material and the moveable section moved, a non-uniform state of stress and strain can be characterized.
    Type: Application
    Filed: October 14, 2008
    Publication date: April 30, 2009
    Applicant: The Board of Trustees of the University of Illinois
    Inventors: Jamshid Ghaboussi, Youssef M.A. Hashash, David Pecknold
  • Methods and systems for modeling material behavior
    Patent number: 7447614
    Abstract: A method for modeling material behavior includes using empirical three dimensional non-uniform stress and strain data to train a self-organizing computational model such as a neural network. A laboratory device for measuring non-uniform stress and strain data from material includes an enclosure with an inclusion in it. As the enclosure is compressed, the inclusion induces a non-uniform state of stress and strain. A field testing device includes a body having a moveable section. When the body is inserted in a material and the moveable section moved, a non-uniform state of stress and strain can be characterized.
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: November 4, 2008
    Assignee: The Board of Trustees of the University of Illinois
    Inventors: Jamshid Ghaboussi, Youssef M. A. Hashash, David Pecknold
  • Methods and systems for modeling material behavior
    Publication number: 20030216894
    Abstract: A method for modeling material behavior includes using empirical three dimensional non-uniform stress and strain data to train a self-organizing computational model such as a neural network. A laboratory device for measuring non-uniform stress and strain data from material includes an enclosure with an inclusion in it. As the enclosure is compressed, the inclusion induces a non-uniform state of stress and strain. A field testing device includes a body having a moveable section. When the body is inserted in a material and the moveable section moved, a non-uniform state of stress and strain can be characterized.
    Type: Application
    Filed: April 9, 2003
    Publication date: November 20, 2003
    Applicant: The Board of Trustees of the University
    Inventors: Jamshid Ghaboussi, Youssef M.A. Hashash, David Pecknold