Effects of failure mode II on crack initiation and crack propagation steps using multilevel fatigue loading test

被引：0
作者：
Hong S.P. [1 ]
Park S.M. [1 ]
Kim J.H. [2 ]
机构：
[1] Hong, Seok Pyo
[2] Park, Sae Min
[3] Kim, Ju Hee
来源：
Kim, Ju Hee (kjh6452@gmail.com) | 2017年 / Korean Society of Mechanical Engineers卷 / 41期
关键词：
Fatigue Crack Propagation Rate; Mixed-mode Fatigue Threshold; Mixed-mode Loading; Multilevel Loading; Stress Intensity Factor;
D O I：
10.3795/KSME-A.2017.41.9.853
中图分类号：
学科分类号：
摘要：
To evaluate the effects of mode II on the crack initiation and propagation stages, the effects in the fatigue threshold region under a mixed-mode I+II loading state was experimentally investigated. In the case of mixed-mode I + II, during the crack initiation stage, as the loading application angle (θ) increased, cracks occurred in the lower load owing to the effects of mode II, while the crack propagation rate decreased. The effects of mode II were experimentally investigated in the crack propagation stage by means of multilevel loading direction variation. Following mixed-mode I+II (0°→θ→ 60°), as the load application angle increased, the fatigue crack propagation rate decreased, as did the fatigue crack propagation rate, which occurred later. Following mixed-mode I + II in case of(θ =75°), the fatigue crack propagation rate was found to increase, while the fatigue life decreased. © 2017 The Korean Society of Mechanical Engineers.
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页码：853 / 860
页数：7
相关论文
共 7 条
  • [1] Qian J., Fatemi A., Mixed mode fatigue crack growth: A literature survey, Engineering Fracture Mechanics, 55, 6, pp. 969-990, (1996)
  • [2] Richard H.A., Benitz K., A loading device for the criterion of mixed mode in fracture mechanics, International Journal of Fracture, 22, pp. R55-R58, (1983)
  • [3] Hong K.J., Kang K.J., Method to measure k<sub>i</sub>, k<sub>II</sub> and j-integral for CTS specimen under mixed mode loading, Trans. Korean Soc. Mech. Eng. A, 20, 11, pp. 3498-3560, (1996)
  • [4] Gao H., Brown M.W., Miller K.J., Mixed-mode fatigue threshold, Fatigue of Engineering Materials and Structures, 5, 1, pp. 1-77, (1982)
  • [5] Tanaka K., Fatigue crack propagation form a crack inclined to the cyclic tensile axis, Engineering Fracture Mechanics, 6, pp. 493-507, (1974)
  • [6] Barsom J.C., Fatigue Behavior of Pressure-Vessel Steels, (1974)
  • [7] Dahlin P., Olsson M., Reduction of mode i fatigue crack growth rate due to occasional mode II loading, International Journal of Fatigue, 26, pp. 1083-1093, (2004)
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