Patents by Inventor Sing Chih Tang

Sing Chih Tang 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 applying the radial return method to the anisotropic hardening rule of plasticity to sheet metal forming processes
    Patent number: 6205366
    Abstract: A method (100) for predicting distortion of a sheet metal during a sheet forming process to form the sheet metal into a part. The method (100) of the present invention is for use with a computer including memory and sheet forming tools. The method (100) comprises applying (104-116) the radial return method to compute the total stress for the anisotropic hardening rule of Mroz. The method (100) of the present invention does not divide a given strain increment into hundreds of subintervals as long as the movement of the center of the active yield surface is along a fixed path. If a break occurs, the given strain increment is divided into a few segments (110).
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: March 20, 2001
    Assignee: Ford Global Technologies, Inc.
    Inventors: Sing Chih Tang, Perry Robinson MacNeille, Zhiyong Cedric Xia
  • Method of applying an anisotropic hardening rule of plasticity to sheet metal forming processes
    Patent number: 6009378
    Abstract: A method is disclosed for developing a sheet metal forming process prediction method which is based on the application of an anisotropic hardening rule of plasticity in the mathematic theory.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: December 28, 1999
    Assignee: Ford Global Technologies, Inc.
    Inventors: Sing Chih Tang, James Calvey Carnes