The nature of the elastic-plastic strain invariant is considered. It is shown that the absolute values of the invariant obtained in experiments obey the normal distribution. The contributions of the scale and velocity factors to the invariant value are studied. The independence of the invariant on the temperature is established.

中文翻译：

---

弹塑性应变不变量的性质

考虑了弹塑性应变不变量的性质。结果表明，实验中得到的不变量的绝对值服从正态分布。研究了尺度和速度因子对不变值的贡献。建立了不变量对温度的独立性。