Patents by Inventor Eftychios D. Sifakis

Eftychios D. Sifakis 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, methods and, media for simulating deformations of nonlinear elastic bodies
    Patent number: 10282899
    Abstract: In accordance with some embodiments, systems, methods and media for simulating deformation of an elastic body are provided. In some embodiments, a method comprises: determining for each macroblock, a stiffness matrix Ki of a portion of a model of a non-linear elastic solid partitioned into cells; converting Ki into block form to include a submatrix KIiIi for nodes between internal cells of a first macroblock; determining at least a portion of KIiIi?1; receiving input corresponding to force applied to cells of the model; determining displacements of exterior nodes of the first macroblock using the input and the portion of KIiIi?1; determining displacements of interior nodes of the first macroblock using the input and the displacements of exterior nodes; determining updated positions of the cells based on the displacements of the exterior nodes; and, causing the model to be presented using the updated positions.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: May 7, 2019
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Nathan M. Mitchell, Eftychios D. Sifakis, Michael S. Doescher
  • SYSTEMS, METHODS AND, MEDIA FOR SIMULATING DEFORMATIONS OF NONLINEAR ELASTIC BODIES
    Publication number: 20190012831
    Abstract: In accordance with some embodiments, systems, methods and media for simulating deformation of an elastic body are provided. In some embodiments, a method comprises: determining for each macroblock, a stiffness matrix Ki of a portion of a model of a non-linear elastic solid partitioned into cells; converting Ki into block form to include a submatrix KIiIi for nodes between internal cells of a first macroblock; determining at least a portion of KIiIi?1; receiving input corresponding to force applied to cells of the model; determining displacements of exterior nodes of the first macroblock using the input and the portion of KIiIi?1; determining displacements of interior nodes of the first macroblock using the input and the displacements of exterior nodes; determining updated positions of the cells based on the displacements of the exterior nodes; and, causing the model to be presented using the updated positions.
    Type: Application
    Filed: July 10, 2017
    Publication date: January 10, 2019
    Inventors: Nathan M. Mitchell, Eftychios D. Sifakis, Michael S. Doescher