Method for predicting an amount of dimensional accuracy...

Details Method for predicting an amount of dimensional accuracy... Method for predicting an amount of dimensional accuracy...

2005-07-05

2005-07-05

Paladini, Albert W. (Department: 2125)

Data processing: structural design, modeling, simulation, and em

Modeling by mathematical expression

C703S007000, C073S783000

Reexamination Certificate

active

06915244

ABSTRACT:
A method in which engineers having no experience and technical storage can preliminarily easily and accurately predict an amount of dimensional accuracy defect which occurs at the time of press-forming a metal sheet before press-forming without having expertise such numerical value simulations and mathematics. In predicting an amount of dimensional accuracy defect at the time of press-forming a metal sheet, as a stress-strain relationship, an elastic-perfectly plastic solid model having a fixed stress value after being yielded is adopted and a value which is equal to or less than a tensile strength and exceeds a yield strength is used as an apparent yield strength.

REFERENCES:
patent: 5379227 (1995-01-01), Tang et al.
patent: 6205366 (2001-03-01), Tang et al.
patent: 6544354 (2003-04-01), Kawano et al.
patent: 6731996 (2004-05-01), MacEwen et al.

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