Nonlinear fatigue damage accumulation and life prediction of metals: A comparative study

Fatigue and Fracture of Engineering Materials and Structures - Tập 42 Số 6 - Trang 1271-1282 - 2019
Shun‐Peng Zhu1,2, Yong‐Zhen Hao2, José A.F.O. Correia3, Grzegorz Lesiuk4, Abílio M.P. De Jesus3
1Center for System Reliability and Safety, University of Electronic Science and Technology of China, Chengdu, 611731, China
2School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
3INEGI, Faculty of Engineering, University of Porto, Porto 4200-465, Portugal
4Faculty of Mechanical Engineering, Department of Mechanics, Materials Science and Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50-370 Wroclaw, Poland

Tóm tắt

AbstractFatigue damage modelling and life prediction of engineering components under variable amplitude loadings are critical for ensuring their operational reliability and structural integrity. In this paper, five typical nonlinear fatigue damage accumulation models are evaluated and compared by considering the influence of load sequence and interaction on fatigue life of P355NL1 steels. Moreover, a new nonlinear fatigue damage accumulation model is proposed to account for these two effects. Experimental datasets of pressure vessel steel P355NL1 and four other materials under two‐block loadings are used for model comparative study. Results indicate that the proposed model yields more accurate fatigue life predictions for the five materials than the other models.

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Thông tin xuất bản

Fatigue and Fracture of Engineering Materials and Structures

Tập 42 Số 6

1271-1282

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