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

作者：Zhu, Shun-Peng; Huang, Hong-Zhong^*; He, Li-Ping; Liu, Yu; Wang, Zhonglai

来源：Engineering Fracture Mechanics, 2012, 90: 89-100.

DOI：10.1016/j.engfracmech.2012.04.021

• High temperature low cycle fatigue
• Creep
• Energy
• Life prediction
• Turbine disk
• Mean strain

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's 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.

• 出版日期2012-8
• 单位电子科技大学