多晶体循环应力—应变曲线的理论模拟

Theoretical Predictions of Cyclic Stress-Strain Response of Polycrystalline Copper

采用ＫＢＷ自洽理论和以前提出的单晶硬化律，对铜多晶体的循环应力－应变曲线进行了理论模拟，其范围包括高周疲劳阶段和低周疲劳阶段。结果与有关实验定量相符。

With the KBW self-consistent model and the single crystal hardening law, previously proposed by Sun and Hwang, the cyclic stress-strain response of polycrystalline copper over both high and low-cycle fatigue ranges has been obtained. The predictions are in quantitative agreement with the corresponding experiments. In addition, the theoretical modelling confirms that the cyclic stress-strain curve of polycrystalline copper has no plateau.