Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5015256 | International Journal of Fatigue | 2017 | 52 Pages |
Abstract
The purposes of the present work are to extend the previous energy-based model on the basis of strain energy density exhaustion and to estimate creep-fatigue endurance and accumulated damage using cycle-by-cycle concept in tension-hold-only tests. The nickel-based GH4169 superalloy at 650 °C is employed to fit material constants and to verify the prediction capacity of the present model under various loading conditions. The present model exhibits a higher accuracy than some existing models, especially for certain loading waveforms, where the half-life cycle cannot be considered as a representative one. In addition, the trajectory for time-dependent accumulated damage during the operating period can be monitored in the creep-fatigue interaction diagram.
Related Topics
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Engineering
Mechanical Engineering
Authors
Run-Zi Wang, Xian-Cheng Zhang, Jian-Guo Gong, Xu-Min Zhu, Shan-Tung Tu, Cheng-Cheng Zhang,