![]() ![]() The flow stress curve, which reflects the sheet material's elastic and plastic properties, typically is obtained from a tensile test or bulge test. This curve is one of the most important variables for calculating input data for the finite element (FE) and analytical methods used to predict metal flow and defects. ![]() They don't, however, always provide the true stress-true strain (flow stress) curve. Material suppliers often provide the yield stress and ultimate tensile strength for sheet materials. Editor's Note: Part II of this article will appear in the July/August 2011 issue. ![]()
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