The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2001
Filed:
Sep. 14, 1999
Sing Chih Tang, Plymouth, MI (US);
Perry Robinson MacNeille, Lathrup Village, MI (US);
Zhiyong Cedric Xia, Canton, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A method (,) for predicting distortion of a sheet metal during a sheet forming process to form the sheet metal into a part. The method (,) of the present invention is for use with a computer including memory and sheet forming tools. The method (,) comprises applying (,) the radial return method to compute the total stress for the anisotropic hardening rule of Mroz. The method (,) 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 (,).