期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 128, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2019.105185
关键词
Fatigue; Variable amplitude loading; Isodamage curve; Damage accumulation; Life prediction
资金
- National Natural Science Foundation of China [11672070]
- Open Project Program of State Key Laboratory of Mechanical Transmissions of Chongqing University [SKLMT-KFKT-201719]
- Sichuan Provincial Key Research and Development Program [2019YFG0348]
- Science and Technology Program of Guangzhou, China [201904010463]
Cumulative fatigue damage analysis and life prediction of engineering structures/components is vital for ensuring their structural integrity and operational reliability under variable amplitude loadings. In this regard, a new nonlinear fatigue damage accumulation model is proposed by introducing a damage function related to the isodamage curves and remaining life aspects. Specifically, its damage exponent is refined by considering effects of loading history. Experimental data from tests available in literature are utilized for model validation and comparison. Compared with four existing models, the proposed model shows higher precision for cumulative damage modelling and fatigue life prediction than others. Moreover, it improves the deficiencies inherent in other rules under the promise of maintaining its simplicity in practice.
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