Crack growth behavior of 7075-T6 under biaxial tension–tension fatigue

Misak, Heath Edward; Perel, Victor Y.; Sabelkin, V.; Mall, S.

doi:10.1016/j.ijfatigue.2013.06.003

Cited by 46 publications

(12 citation statements)

References 12 publications

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“…[ 11, 22 ] The introduction of stress parallel to the crack direction will reduce the size of the plasticity zone at the crack tip even if under the same stress intensity factor. [ 23 ] Under the same ∆K Ι , further increasing biaxial stress ratio λ causes the sequent decrease of biaxial FCG rate, however, the influence of biaxial stress ratio gradually decreases. It can be attributed to the instability of the crack propagation path.…”

Section: Resultsmentioning

confidence: 99%

Fatigue crack propagation behavior of polyether ether ketone under biaxial loading

Meng

Liu

et al. 2021

Polymer Engineering & Sci

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Polyether ether ketone (PEEK) has become a promising material in total joint replacement. However, it still faces the risk of fatigue fracture during service. In this paper, the effects of biaxial stress ratio λ, cyclic stress ratio R, and load phase difference θ on fatigue crack propagation (FCG) behavior of PEEK are investigated. In the case of vertical cracks, results show that the FCG rate of PEEK increases with the R value, while decreases with the increase of λ value. Furthermore, the effective stress intensity factor range ΔKeff can uniformly describe the biaxial FCG behavior at different cyclic stress ratios. In the case of 45° slant cracks, compared with mode‐I intensity factor range ΔKI, the energy release rate range ΔG is more accurate for describing the FCG behavior under various load phase differences. In addition, the investigation on the 45° crack propagation path shows that a bifurcated Y‐shaped crack appears under 180° load phase difference, while no bifurcated crack appears under 90° load phase difference and uniaxial loading. Three different methods are used to predict the crack propagation path. The comparison results show that the maximum circumferential stress (MTS) criterion can well predict the crack propagation path under out‐of‐phase biaxial loading and uniaxial loading.

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Section: Resultsmentioning

confidence: 99%

Fatigue crack propagation behavior of polyether ether ketone under biaxial loading

Meng

Liu

et al. 2021

Polymer Engineering & Sci

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“…In order to study the crack propagation behaviour under biaxial loading conditions, many researchers have done lots of works. [11][12][13][14][15][16][17][18] Misak et al 11,12 investigated the mixed-mode FCGR in cruciform specimens with a 45 inclined centre notch under various mixed-mode biaxial loading conditions. They have reported that the FCGR in biaxial tension fatigue with higher biaxiality ratio is faster than that with lower biaxiality ratio at a given crack driving force level.…”

Section: Introductionmentioning

confidence: 99%

The effect of residual stress on mixed‐mode crack propagation behaviour in friction stir welded 7075‐T6 aluminium alloy panel under biaxial loading

Zhang

Wang

et al. 2021

Fatigue Fract Eng Mat Struct

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The effect of residual stress on mixed-mode crack propagation behaviour in friction stir welded (FSW) 7075-T6 panel under biaxial loading was investigated. Stress intensity factors (K I and K II) were used to study the effects of residual stress on crack behaviours with five different biaxial loading ratios. It was observed that residual stress has a considerable effect on the mixed-mode crack growth. In most cases, the crack deviation from the initial crack is mainly affected by residual stress at the beginning of crack propagation. The variation of crack path is strongly linked with the residual stress as well as the biaxial loading ratio. In addition, K I and K II are susceptible to residual stress under biaxial loading conditions. Residual stresses contribute to a higher proportion of K II compared with that of K I. K I and K II in the retreating side are more affected by the residual stress.

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“…Taylor and Lee 9 investigated the biaxiality ratio effects on FCG behavior by using cruciform‐shaped samples made of 1100‐H14 and 7075‐T651 aluminum alloys and concluded that non‐singular stress along the direction of crack has effects on the trajectory of FCG and fatigue life of the structures made of mentioned aluminum alloys under both in‐phase and out of phase biaxial loading. Misak et al 10 presented the FCG of Al‐7,075‐T6 under biaxial loads when both applied stresses were tensile in nature. He reported that crack initiation and growth is coplanar with the initial crack under equibiaxial loading condition and it is noncoplanar for the case when λ = 1.5, whereas the higher rate of FCG will be observed in case of a higher value of λ, for example, 1.5 as compared to the case of uniaxial fatigue or biaxial fatigue with a lower value of λ, for example, 0.5 or 1 under a certain level of crack driving force in air environment 11 .…”

Section: Introductionmentioning

confidence: 99%

Fatigue crack growth analysis of biaxially loaded hole‐edge cracks using boundary cracklet method (BCM)

Ahmed

Yavuz

Türkmen

2021

Fatigue Fract Eng Mat Struct

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Fatigue crack growth (FCG) behavior of two symmetric cracks originating at different orientations from the outer periphery of a hole in an infinite plate under biaxial tension‐tension loading is presented using two‐dimensional boundary cracklet method. Symmetric precracks of known length and orientation are modelled as initial cracks, and biaxial traction is applied as a far‐field loading. The rate of FCG is computed using Walker's equation, whereas the direction of propagation of crack tip is predicted using the minimum strain energy density criterion. The parametric study is performed with various orientations of initial precracks, biaxiality stress ratios (λ), and stress ratios (R) to show their effects on FCG behavior. Results suggest that for equiaxial loading, the crack propagation direction depends upon the position and initial angle of the crack. Cracks tend to grow perpendicular to that stress which is dominant of the two applied stresses when the biaxiality ratio is not unity.

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Crack growth behavior of 7075-T6 under biaxial tension–tension fatigue

Cited by 46 publications

References 12 publications

Fatigue crack propagation behavior of polyether ether ketone under biaxial loading

Fatigue crack propagation behavior of polyether ether ketone under biaxial loading

The effect of residual stress on mixed‐mode crack propagation behaviour in friction stir welded 7075‐T6 aluminium alloy panel under biaxial loading

Fatigue crack growth analysis of biaxially loaded hole‐edge cracks using boundary cracklet method (BCM)

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