45钢复杂应力状态下低周疲劳损伤准则

以单轴载荷条件下带有沟槽的轴对称试样作为基本模型，研究复杂应力状态下低周疲劳的损伤特性，对稳定循环阶段和非稳定循环阶段的损伤提出了不同的损伤定义，定义了局部有效应力损伤概念，并以此建立复杂应力状态下一种新的累积损伤准则，对４５钢低周疲劳损伤进行了分析。

Damage criterion of low cycle fatigue of medium carbon steel under complicated stress state

Axial symmetrical notched specimens under one-dimensional stress state are selected to be the basic research models to discuss the low cycle fatigue damage criterion under complicated stress state. Different definitions are given to the different damages of steady-cycle fatigue and unsteady-cycle tatigue. Local effective stress is defined to establish a new accumulated damage criterion under complicated stress state. Damage analysis is taken to the low cycle fatigue of medium carbon steel.