本文件规定了一种测定厚度低于3？的金属板的双轴应力-应变曲线的方法mm纯拉伸成形，无明显摩擦影响。与拉伸试验结果相比，可以获得更高的应变值。 注意在本文中，术语“双轴应力-应变曲线”用于简化。原则上，在试验中确定了“双轴真应力-真应变曲线”。

This document specifies a method for determination of the biaxial stress-strain curve of metallic sheets having a thickness below 3 mm in pure stretch forming without significant friction influence. In comparison with tensile test results, higher strain values can be achieved. NOTE      In this document, the term "biaxial stress-strain curve" is used for simplification. In principle, in the test the "biaxial true stress-true strain curve" is determined.