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在四种常用钢的完全对称恒应变控制疲劳实验的基础上,分析了它们的循环滞回能的循环特性,并讨论了不同循环特性材料的循环滞回能的数学描述。通过确定循环滞回能-寿命和失效总吸收能-寿命的理论与实验关系式,得出:循环滞回能表示疲劳损伤时,忽略了循环过程中材料的内部缺陷、热耗散以及加工等因素引起的次裂纹所产生的能耗;总失效吸收能与循环滞回能的关系和循环滞回能的循环变化性质有关。
Based on the completely symmetrical constant strain control fatigue tests of four kinds of commonly used steels, the cyclic characteristics of their cyclic hysteresis energy are analyzed. The mathematical description of the cyclic hysteresis energy of materials with different cyclic characteristics is also discussed. By determining the relationship between theoretical and experimental values of cyclic hysteresis energy - life expectancy and total failure energy - life expectancy, it is concluded that cyclic hysteresis can represent the internal defects, heat dissipation and processing Energy consumption caused by secondary cracks caused by factors; the relationship between total failure absorption energy and cyclic hysteresis energy is related to the cyclic variation of cyclic hysteresis energy.