On the basis of the multiaxial fatigue experiments, the characteristics of cyclic stress-strain response and the behaviors of cyclic hardening and softening were studied under multiaxial cyclic loading.
研究了该材料多轴循环载荷下的应力应变响应特性和循环硬化软化规律。
参考来源 - 高温缺口件多轴弹塑性有限元分析与寿命预测研究·2,447,543篇论文数据，部分数据来源于NoteExpress
结果表明，所研究的几种球铁都具有循环硬化特征。
The investigated results show that all of investigated nodular cast iron has the cyclic hardening characteristic.
讨论了材料在不同加载路径及不同工况下的循环硬化特性。
The cyclic hard- ening behavior under different loading paths and different load conditions was studied.
循环硬化曲线可以分成三个阶段：初始阶段、速硬化阶段和饱和阶段。
Thehardening curve can be divided into three stages, i. e. first, rapid-hardening and saturated stage.
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