1. Low-cycle fatigue behavior and life prediction of CP-Ti under non-proportional and multiaxial loading.
- Author
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Ma, Tian-Hao, Gao, Ning, Chang, Le, He, Xiao-Hua, and Zhou, Chang-Yu
- Subjects
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FATIGUE life , *STRAIN energy , *PREDICTION models , *ENERGY density , *MICROSCOPY - Abstract
• The maximum principal strain critical plane is more effective under both IP and OP loading. • FS model and KBM-P model can be applied to both IP and OP loading in a general form. • MLCF life prediction model based on newly defined α N f and α are established. Non-proportional multiaxial low-cycle fatigue (MLCF) tests were performed on CP-Ti at different multiaxial strain ratios. The optical microscopy observations and life prediction models verified that the critical plane of CP-Ti was the maximum principal strain plane and that it was effective under non-proportional loading. A non-proportional life coefficient and strain energy density coefficient are proposed. Typical MLCF life prediction models, such as the ESN, FS, KBM, and KBM-P models, are discussed under non-proportional loading. Finally, by associating the newly defined non-proportional life coefficient with the non-proportional hardening factor, two comprehensive non-proportional MLCF life prediction models are established, which have higher accuracies than those of previous models. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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