基于Walker等效应变的涡轮盘低周疲劳寿命预测  

Low Cycle Fatigue Life Prediction of Turbine Disks Based on Walker Equivalent Strain

作　　者：张国乾[1] 赵明[1] 章胜[1] 商体松[1] 

机构地区：[1]西北工业大学动力与能源学院,西安710072

出　　处：《航空材料学报》2013年第6期81-85,共5页Journal of Aeronautical Materials

基　　金：中科院上海高等研究所资助项目(NBEK-0001)

摘　　要：基于Walker应变寿命预测模型在103 ～ 105范围变化趋势的基础上,提出了一种简化的Walker应变寿命预测模型,应用简化模型对发动机涡轮盘的低循环疲劳寿命进行了预测.采用GH4133合金的试验数据对简化模型进行验证;采用不同方法对涡轮盘的寿命进行预测,并与涡轮盘的试验值进行比较.结果表明：本工作简化模型预测精度较高,涡轮盘的寿命预测值与试验结果吻合较好,并且简化模型简单明了.A simplified Walker strain-life prediction model was proposed based on the research of the change of the Walker strain-life prediction model in the 103 ～ 105.The low cycle fatigue life （LCF） of the disk was predicted by using the simplified model.The experimental data of GH4133 material were used to verify the simplified model,and the fatigue life of disk was predicted by using different methods.The prediction value was also compared with the experimental results.The results show that the simplified model has a higher prediction accuracy.The prediction lives of turbine disks are in good agreement with the experimental results,and the simplified model is simple and easier for engineering applications.

关 键 词：低循环疲劳 Walker等效应变 寿命预测 涡轮盘 

分 类 号：V232.3[航空宇航科学与技术—航空宇航推进理论与工程]