Crack growth behavior under biaxial fatigue with phase difference

Mall, S.; Perel, Victor Y.

doi:10.1016/j.ijfatigue.2015.01.005

Cited by 31 publications

(19 citation statements)

References 12 publications

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“…The 2 cracks then propagate symmetric to the 45° plane with an angle of 90° between them. This splitting of the crack into 2 cracks was also observed by Mall and Perel for in‐plane biaxial fatigue tests with 180° phase difference. The orientation of the cracks in this case can be explained using the maximum hoop stress theory, which states that the crack tends to propagate in the direction that results in maximum hoop stress at the crack tip, leading to minimization of the K II component of the crack driving force.…”

Section: Resultssupporting

confidence: 81%

Fatigue crack propagation under in‐phase and out‐of‐phase biaxial loading

Neerukatti

Datta

Chattopadhyay

et al. 2017

Fatigue Fract Eng Mat Struct

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Fatigue damage characteristics of aluminium alloy under complex biaxial loads such as in‐phase and out‐of‐phase loading conditions and different biaxiality ratios have been investigated. The effects of microscale phenomena on macroscale crack growth were studied to develop an in‐depth understanding of crack nucleation and growth. Material characterization was conducted to study the microstructure variability. Scanning electron microscopy was used to identify the second phase particles, and energy dispersive X‐ray spectroscopy was performed to analyse their phases and elements. Extensive quasi‐static and fatigue tests were conducted on Al7075‐T651 cruciform specimens over a wide range of load ratios and phases. Detailed fractography analysis was conducted to understand the crack growth behaviour observed during the fatigue tests. Significant differences in crack initiation and propagation behaviour were observed when a phase difference was applied. Primarily, crack retardation and splitting were observed because of the constantly varying mode mixity caused by phase difference. The crack growth behaviour and fatigue lives under out‐of‐phase loading were compared with those under in‐phase loading to understand the effect of mixed‐mode fracture.

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Section: Resultssupporting

confidence: 81%

Fatigue crack propagation under in‐phase and out‐of‐phase biaxial loading

Neerukatti

Datta

Chattopadhyay

et al. 2017

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

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“…Gotoh, Niwa, and Anai () evaluated the effect of phase difference on the biaxial FCG rate of steel under six different loading conditions, and it is found that the FCG rate was the largest under 180° phase difference. Mall and Perel () investigated the FCG behavior of aluminum alloy 7075‐T6 under in‐plane biaxial tension with phase differences of 90° and 180°. It was found that the cracks exhibited bifurcation behavior under both 90° and 180° phase differences, but the FCG rates after splitting were almost the same under both phase differences.…”

Section: Discussionmentioning

confidence: 99%

“…Biaxial FCG path in the presence of phase difference is also one of the hot research fields currently. Mall and Perel () observed the bifurcation behavior of 45° slant crack during in‐plane biaxial tension fatigue with phase differences of 90° and 180°. Infante‐García, Qian, Miguélez, and Giner () simulated the FCG behavior of 45° slant cracks under biaxial loading using a finite element method based on linear elastic fracture mechanics.…”

Section: Discussionmentioning

confidence: 99%

Biaxial fatigue crack propagation behavior of ultrahigh molecular weight polyethylene reinforced by carbon nanofibers and hydroxyapatite

et al. 2019

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Ultrahigh molecular weight polyethylene (UHMWPE) artificial joint has remained the preferred polymer component in total joint replacement surgery. However, more and more concerns have been raised about the failure of UHMWPE components due to the initiation and propagation of cracks at the notches with fixed functions. For this reason, biaxial fatigue crack growth (FCG) experiments of UHMWPE reinforced by carbon nanofibers (CNF) and hydroxyapatite (HA) were carried out using elastic–plastic fracture mechanics theory. The FCG resistance of UHMWPE, UHMWPE/CNF, and UHMWPE/HA was compared, and the effects of stress ratio (R) value and phase difference on FCG rate were investigated. At the same time, the influence of loading path was considered, and the corresponding crack path was analyzed. Results suggest that UHMWPE/CNF has better FCG resistance and the FCG rate increases with the increase of R value and the existence of 180° phase difference. In addition, crack bifurcation behavior is not observed under nonproportional loading conditions. The findings in this study will provide experimental validation and data support for better clinical application of UHMWPE‐modified materials.

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“…The determination of the stress intensity factors for other specimen geometries as well as components K comp is performed by means of the crack length-dependent as well as geometry-dependent correction function Y (a), see Eq. (5). The determination of the Y values for specific crack length a for cruciform specimens can by done by Eq.…”

Section: Scaling Of the Forces Stresses And Stress Intensity Factorsmentioning

confidence: 99%

“…Refs. [3][4][5][6][7], and (iii) specimen design with thickness-reduced measuring area and slotted arms, see e.g. Refs.…”

Section: Introductionmentioning

confidence: 99%

Cruciform specimens for the determination of crack growth behaviour in biaxial stress fields: calculation of K-factors

et al. 2019

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The aim of this study is to propose a simplified calculation of the Mode I stress intensity factor K for the cruciform specimen design proposed by Brown and Miller. To calculate K, both cracks have to grow with a similar crack growth rate and the crack paths of the two single cracks with the length a should also be similar. The calculations are carried out on an aluminum specimen and a steel specimen. For all load cases and materials, the stresses resulting from the forces are first considered. It was found that the elastic constants E and ν have only a small influence of less than 3 %. In addition, the coupling between the forces of the load axes, which should be minimized by the slotted arms, is considered. Furthermore K-factors are calculated by FE for diﬀerent crack lengths. These K-values together with the transmission factor allow to find a K-factor formula for cruciform specimens, which is based on the prescribed forces. Finally, the results of the FE calculation of the exact straight crack paths were compared to experimentally determined crack paths.

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Crack growth behavior under biaxial fatigue with phase difference

Cited by 31 publications

References 12 publications

Fatigue crack propagation under in‐phase and out‐of‐phase biaxial loading

Fatigue crack propagation under in‐phase and out‐of‐phase biaxial loading

Biaxial fatigue crack propagation behavior of ultrahigh molecular weight polyethylene reinforced by carbon nanofibers and hydroxyapatite

Cruciform specimens for the determination of crack growth behaviour in biaxial stress fields: calculation of K-factors

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