Patent ID: 11886778
Assignee: MAGNA INTERNATIONAL INC.
Field: Measurement (Instruments)
Classification: CPC G  B  Y | IPC B  G

Claim 6:
7. A system for shifting a forming analysis based on zero friction analysis, comprising:
a data store comprising a computer readable medium storing a program of instructions for the shifting of a forming analysis;
a processor that executes the program of instructions, the instructions comprising the following operations:
calculating a first alpha stress value from a ratio of a minor stress and a major stress from a predefined property of a hemispheric dome test of a die, the die being employed to deform sheet metal used to perform the hemispheric dome test;
determining a forming limit diagram (FLD) based on the major stress and the minor stress;
generating a second alpha stress value of a zero friction analysis of an upper fiber;
determining an alpha stress value ratio based on the first alpha stress value and the second alpha stress value;
generating a beta value of a zero friction analysis of a middle fiber;
generating a corrected zero friction test using the alpha stress value ratio and the beta value;
determining an updated FLD based on the major stress, the minor stress, and the corrected zero friction test; and
using the updated FLD to deform sheet metal using the die.