中文摘要：

借助热像法和能量法快速确定了单轴循环应力作用下Q235钢的疲劳性能参数,与传统实验结果相比,吻合较好。基于极限能理论假设,建立了Miner线性累积损伤理论的能量模型以预测构件的残余寿命。研究结果表明：热像法和能量法可以在较短的实验周期内快速地确定材料的疲劳极限和S-N曲线等疲劳性能参数;Miner理论的能量模型具有明确的物理意义,能准确预测循环载荷作用下构件的残余寿命。

英文摘要：

The infrared thermography was used to rapidly determine the fatigue parameters of Q235 steel undergoing uniaxial cyclic stress,and a good agreement was achieved between the predicted results and the results from the traditional fatigue testing methods.Based on the assumption of the limiting energy theory,the energy approach based on Miner＇s law was advanced to predict the residual fatigue life of samples.The results show that the infrared thermography and the energy approach can be used to rapidly determine the fatigue limit and the S-N curve in a short test period;and that the residual fatigue life can be accurately predicted by the energy approach based on Miner＇s law with clear physical meaning.