A generalized energy-based fatigue-creep damage parameter for life prediction of turbine disk alloys

详细信息	查看全文 | 推荐本文 |

• 作者：Shun-Peng Zhu ; Hong-Zhong Huang ; ^{hzhuang@uestc.edu.cn} ; Li-Ping He ; Yu Liu ; Zhonglai Wang
• 关键词：High temperature low cycle fatigue ; Creep ; Energy ; Life prediction ; Turbine disk ; Mean strain
• 刊名：Engineering Fracture Mechanics
• 出版年：2012
• 期刊代码：33_00137944
• 类别：ms
• 出版时间：August, 2012
• 卷：90
• 期：Complete
• 页码：89-100
• 文件大小：483 K

摘要

In this paper, a new model for life prediction of turbine disk alloys (GH4133) is proposed. Based on plastic strain energy density, a generalized energy-based fatigue-creep damage parameter is developed to account for creep and mean strain/stress effects in the low cycle fatigue regime. Moreover, the mechanism of cyclic hardening is taken into account within this model. It provides a better prediction of GH4133鈥檚 fatigue behavior when compared to the Smith-Watson-Topper and plastic strain energy density methods. Under mean strain conditions, the proposed model provides a more accurate life prediction of GH4133 than that under zero-mean strain conditions.