Methods and systems for conducting a time-marching numerical simulation of a deep drawing metal forming process for manufacturing a product or part

摘要

A FEA model representing a product/part with certain finite elements for metal portion, metal fracture failure criteria, a measurement characteristic length in a specimen test, and characteristics of a neck formed in the metal are received in a computer system. The metal fracture failure criteria contain respective measured critical strain value and average fracture strain value in various loading conditions. The characteristics of the neck include the neck's width and a profile of strain distribution within the neck's width. Respective peak fracture strain values are calculated for various loading conditions using a formula based on the profile of strain distribution, the neck's width, and measured critical strain value and average fracture strain value. Peak fracture strain values are used in each solution cycle of a time-marching simulation of a deep drawing metal forming process for manufacturing the product/part.