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在Coffin－Manson公式的基础上提出了低周疲劳损伤及寿命预测的塑性功模型，即选择滞回能的一半Wai、拉伸断裂塑性功Wf及一个材料常数β来定义发生明显循环硬化及循环软化材料的疲劳损伤参量Di＝（Wai／Wf）β。并从内、外两方面因素分别讨论了外界作用程度（Wai）及材料的固有属性(Wf及β)在低周疲劳损伤中的作用。
Based on the Coffin-Manson formula, a plastic work model of low cycle fatigue damage and life prediction is proposed, which is to choose half of the hysteretic energy, tensile plastic strain work Wf and a material constant β to define the obvious cycle hardening and circulation Softening material fatigue damage parameters Di = (Wai / Wf) β. In addition, the effects of external factors (Wai) and intrinsic properties of materials (Wf and β) on low-cycle fatigue damage were discussed respectively from the inside and outside.