Investigation on fatigue crack growth behavior for commercial pure titanium at different crack tip plastic deformed levels

Li, Jian; Su, Chuan-Yi; Lü, Linnü; Zhang, Peng; Chang, Le; Miao, Xin-Ting; Zhou, Binbin; He, Xin; Zhou, Changyu

doi:10.1016/j.tafmec.2018.12.010

Cited by 10 publications

(7 citation statements)

References 24 publications

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“…There are two main types of damage in the process of fatigue crack growth: static damage and cyclic damage [15]. Static damage is controlled by the maximum stress intensity factor K max , while cyclic damage is controlled by ΔK.…”

Section: The In Uence Of Loading Parameters On the Plastic Zone Of Cr...mentioning

confidence: 99%

“…It is one-sided to explain the in uence of parameters on crack growth behavior based on linear elastic fracture theory. In fact, with the help of nite element method considering cyclic loading, Jian studied plastic deformation characteristics, damage accumulation and energy change process of materials under cyclic loading, and analyzed the in uence of four kinds of working conditions on crack growth [15]. Therefore, in this paper, the crack growth behavior for Zr/Ti/steel composite plate is studied by experiment and nite element analysis under different loading parameters.…”

Section: Introductionmentioning

confidence: 99%

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Research on the fatigue crack growth behavior of Zr/Ti/steel composite plate with a crack normal to interface

Zhou

Yuan

Song

et al. 2023

Preprint

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Current work reveals the influence of loading parameters on the crack growth behavior of Zr/Ti/steel composite plate with a crack perpendicular to the interface by using experiment and finite element method. Finite element results reveal that loading parameters significantly affect hysteresis loop of Zr/Ti/steel composite plate, stress amplitude and the plastic strain accumulation degree of subsequent cyclic loading under different loading parameters. In addition, equivalent plastic strain at crack tip, its change rate and distribution are also explored in detail. Furthermore, it is also found that the elastic-plastic mismatch will also affect the plastic evolution, that is, strengthen or weaken the effect of loading parameters.

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Section: The In Uence Of Loading Parameters On the Plastic Zone Of Cr...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on the fatigue crack growth behavior of Zr/Ti/steel composite plate with a crack normal to interface

Zhou

Yuan

Song

et al. 2023

Preprint

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“…With the continuous extension of fatigue cracks, the area of the von Mises equivalent stress cloud diagram at the crack tip is increasing. 36 When the fatigue crack length is a = 27.53mm, the maximum stress is 1080 MPa. This is consistent with the variation of the crack tip stress intensity factor with crack length in the experiment (as shown in Figure 4).…”

Section: Numerical Simulation Of Fatigue Crack Propagationmentioning

confidence: 99%

Fatigue crack propagation experiment and numerical simulation of 42CrMo steel

Dong

Wei

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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42CrMo steel is widely used in ultrahigh-strength structures such as low-speed heavy-duty gears. Mastering the fatigue crack propagation law has important significance for predicting structural fatigue life. Firstly, the fatigue crack propagation experiment is used to obtain the upper and lower thresholds value of type I fatigue crack propagation of 42CrMo steel compact tensile specimen under the alternating load of stress ratio R = 0.1. The Paris formula describing the relationship between the fatigue crack propagation rate and the crack tip stress intensity factor between the upper and lower thresholds value is obtained. Scanning electron microscopy was used to observe the microscopic features of different stages of fatigue fracture. The results show that the twin boundary can provide a place for crack initiation; the defects in the material can promote the initiation and extension of fatigue cracks. The fatigue crack propagation of 42CrMo steel compact tensile specimens was numerically simulated by the finite element method. The relationship between the crack tip stress intensity factor and the crack length was obtained. The analysis results show that the crack tip stress intensity factor calculated by the plane finite element method differs slightly from the experimental results during the stable extension stage. After correction, the correlation coefficient between the numerical simulation correction value and the crack tip stress intensity factor value obtained by the experiment is 0.9926. Finally, the fatigue crack propagation rate corresponding to the crack tip stress intensity factor in the finite element results is calculated by the Paris formula and briefly analyzed. Compared with the experimental results, it shows that the numerical simulation is consistent with it, indicating the accuracy of the numerical simulation method, which can effectively predict the initiation and propagation of fatigue cracks in 42CrMo steel compact tensile specimens.

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“…There have been many studies related to uniaxial fatigue crack growth, which are concerned with the uniaxial fatigue crack growth of AZ31B magnesium alloy [ 1 , 2 ], 7075-T651 aluminum alloy [ 3 ], CP-Ti based metal, and weldment [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Crack Growth Behavior of CP-Ti Cruciform Specimens with Mixed Mode I-II Crack under Biaxial Loading

et al. 2022

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Investigations on the fatigue crack growth of commercial pure titanium are carried out with cruciform specimens under different biaxial load ratios (λ = 0, 0.5, and 1) and crack inclination angles (β = 90°, 60°, and 45°) in this paper. Based on the finite element results, the modified solution of stress intensity factors KI and KII for cruciform specimens containing mixed mode I-II crack is obtained by considering crack size, biaxial load ratio, and crack inclination angles. The experimental results show that the maximum tangential stress criterion is fit for the prediction of crack initiation angles for mixed model I-II crack under uniaxial or biaxial loading condition. When the biaxial load ratio increases, the crack propagation angle becomes smaller, and so does the fatigue crack growth rate of mode I crack or mixed mode I-II crack. Based on an equivalent stress intensity factor, a new valid stress intensity factor is proposed to better describe the biaxial fatigue crack growth behavior, which can demonstrate the contribution of mode I and mode II of stress intensity factor.

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Investigation on fatigue crack growth behavior for commercial pure titanium at different crack tip plastic deformed levels

Cited by 10 publications

References 24 publications

Research on the fatigue crack growth behavior of Zr/Ti/steel composite plate with a crack normal to interface

Research on the fatigue crack growth behavior of Zr/Ti/steel composite plate with a crack normal to interface

Fatigue crack propagation experiment and numerical simulation of 42CrMo steel

Fatigue Crack Growth Behavior of CP-Ti Cruciform Specimens with Mixed Mode I-II Crack under Biaxial Loading

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