The effect of cyclic prestraining on the fatigue life and the microstructural evolution of fatigued copper polycrystals

Ghammouri, M.; Abbadi, M.; Méndez, J.

doi:10.1016/j.ijfatigue.2013.01.009

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…Gas‐turbine engines usually operate under the variable thermal‐mechanical fatigue loadings. Load sequence is widely believed to have a great influence on the accumulated fatigue damage of a component . Taking the loading history into account, various investigations have been performed to understand the micro‐mechanism of fatigue‐failure .…”

Section: Introductionmentioning

confidence: 99%

“…Load sequence is widely believed to have a great influence on the accumulated fatigue damage of a component. [1][2][3][4][5] Taking the loading history into account, various investigations have been performed to understand the micromechanism of fatigue-failure. [6][7][8] Nevertheless, the development of nonlinear fatigue damage model was required to ensure safety and economy in the structural design.…”

Section: Introductionmentioning

confidence: 99%

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Residual fatigue life prediction based on a novel damage accumulation model considering loading history

Shi

et al. 2020

Fatigue Fract Eng Mat Struct

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The influence of prior low‐cycle fatigue (LCF) on the residual fatigue life was investigated experimentally. A Ni‐based alloy was cyclically loaded under stress‐controlled low‐high (LH) block loading. In the first loading step, low‐amplitude loading was performed with the stress amplitude of 283.5MPa at 710°C. Different cycles of preloading were performed, varying from 100 to 10 000. Subsequently, high‐amplitude fatigue loading was carried out with the stress amplitude of 315MPa at 800°C. Experimental results show that the previous loading was beneficial to the residual fatigue life when the consumed life fraction is below 0.2 and detrimental when the consumed life fraction is larger than 0.2. A novel nonlinear fatigue damage accumulation model was proposed to estimate the residual LCF life under LH loading path considering the effects of load sequence and preloading cycles. The proposed model provided a better life prediction than some existing models, such as Kwofie‐Rahbar model, Miner' rule, Peng model, and Ye‐Wang model. Lastly, this model was further validated using various materials under LH and high‐low block loadings.

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Section: Introductionmentioning

confidence: 99%