Shear Fatigue Crack Growth: A Literature Survey

Liu, H. W.

doi:10.1111/j.1460-2695.1985.tb00429.x

Cited by 39 publications

(18 citation statements)

References 16 publications

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“…Generally, the fatigue cracks that initiate on free surfaces undergo both sliding and opening mode displacements (Stage I), and eventually turn to the plane of maximum tensile stress (Stage II) [11]. In RCF, however; cracks remain predominantly in Stage I due to the compressive stresses normal to the crack faces [12].…”

Section: Background and Motivationmentioning

confidence: 99%

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Analysis of surface crack growth under rolling contact fatigue

Canadinç

Şehitoğlu

Verzal

2008

International Journal of Fatigue

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Understanding the fatigue crack growth phenomenon in railheads requires a study of driving forces such as the crack tip opening and sliding displacements, under repeated rolling contact. Finite element simulations, allowing elastic-plastic deformation, and mixed-mode crack growth laws were utilized to demonstrate that the fatigue crack growth rates display a minimum after a finite amount of crack advance. These results have implications in designing strategies for optimum grinding or wear rates to limit fatigue crack growth, and thereby prolong rail life. During the simulations, the crack was allowed to advance, permitting residual deformations and stresses to be retained from cycle to cycle. The opening and closure of crack surfaces, under forward and reverse slip and stick conditions were monitored. Normal pressures of 1500 MPa and 2000 MPa, along with shear traction ratios in the range of -0.4 to 0.4 were investigated for a varying crack size of 3 to 15 mm. An interesting finding was that the crack tip opening displacements decreased while the crack tip sliding displacements increased with increasing crack length.

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Section: Background and Motivationmentioning

confidence: 99%

“…The simplest model for predicting mixed mode crack growth rates is an additive model based on the type of loading experienced by the crack [11]. For a plane strain RC surface crack, Mode I and Mode II loading occurs, and the crack growth rate can be defined as…”

Section: Crack Growth Ratesmentioning

confidence: 99%

Analysis of surface crack growth under rolling contact fatigue

Canadinç

Şehitoğlu

Verzal

2008

International Journal of Fatigue

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“…The mode I growth and the mode II growth are also controlled, respectively, by CTOD and CTSD [21]. As a result, the effect of the coplanar slip and the grain boundary on the stage I growth is undoubtedly associated with the relative variation of CTOD and CTSD.…”

Section: Crack Tip Displacements At the Stage I Short Crack Tipmentioning

confidence: 97%

On the interaction among stage I short crack, slip band and grain boundary: a FEM analysis

1990

Int J Fract

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A FEM model of a stage ! short crack in polycrystals was constructed based on the micromechanics and the physical process of its growth. The effective stress and effective plastic strain at the growing stage I short crack tip is slightly affected by the coplanar slip except in the vicinity of the grain boundary. Stage I growth is a mode transition process from pure shear to pure tensile, which is governed by the interaction among the crack, the slip at the crack tip and the approached grain boundary. The coplanar slip at the stage I crack tip enhances plastic CTSD and promotes the shear mode growth, nevertheless the grain boundary hindering the coplanar slip promotes the tensile mode growth. The apparent fast growth of stage I short cracks is accounted for by the enhanced CTSD resulting from the micro-plasticity in the coplanar PSB at the crack tip; and the minimum growth rate in the vicinity of a grain boundary is correlated with the expended CTSD and internal stress due to incompatible deformation at the boundary. The closure of stage I short crack in the first grain on the path is negligible, but dramatically increases as the crack deflects at the boundary entering into the second grain on its path.

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“…Insofar as propagation of fatigue cracks by K II type is unstable and, according to [46,47], may be realized either in the compression stress field (as in case of fretting fatigue), or within the range of very high SIF values, we have analyzed the existing loading schemes providing pure shear conditions in the crack tip. As a basic loading scheme, we have used the four-point bending one (Fig.…”

mentioning

confidence: 99%

“…As a basic loading scheme, we have used the four-point bending one (Fig. 16a), widely used in [45][46][47][48]. The above scheme has been adapted for testing of specimens of the same edge-notched configuration as those tested by K I type, and for transmission of reversal loads and realization of load 696 Fig.15.…”

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confidence: 99%

Life prediction of titanium and aluminum alloys under fretting fatigue conditions using various crack propagation criteria. Part 1. Experimental and calculation techniques

Khotsyanovskii

2010

Strength Mater

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539.4Using the analysis of state-of-the-art techniques of fretting fatigue studies and results of description of multi-stage fatigue crack propagation in fretting zone within fracture mechanics framework, we have refined the calculation-and-experimental technique earlier proposed by the author. This technique allows one to predict current values of the angle and rate of inclined crack propagation in the subsurface layers of material under fretting conditions using calculated stress intensity factors K I and K II for contact and bulk loads, as well as experimental crack resistance diagrams by K I and/or K II types. We have performed comparative analysis of various techniques for construction of crack resistance diagrams by K I and K II types and obtained the results for AMg6N and Al 7075-T6 aluminum alloys and VT9 titanium alloy. It is shown that the initial stage of crack propagation in the above alloys can occur in the maximal shear stress plane by shear mechanism or in the maximal tensile stress plane by cleavage mechanism according to the Otsuka two-parameter criterion or to the Richard empirical criterion.

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Shear Fatigue Crack Growth: A Literature Survey

Cited by 39 publications

References 16 publications

Analysis of surface crack growth under rolling contact fatigue

Analysis of surface crack growth under rolling contact fatigue

On the interaction among stage I short crack, slip band and grain boundary: a FEM analysis

Life prediction of titanium and aluminum alloys under fretting fatigue conditions using various crack propagation criteria. Part 1. Experimental and calculation techniques

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