Subsurface and Surface Cracking Due to Hertzian Contact

Keer, Leon M.; Bryant, Michael D.; Haritos, George

doi:10.1115/1.3253217

Cited by 127 publications

(55 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our previous work on crack growth in Stage I (shear cracks) forms the basis for our simulations in this study [8]. We extend the work to determination of crack tip opening ( There have been a number of investigations that focused on determining stress intensity levels for cracks subjected to RCF [13][14][15]. The I K ∆ (stress intensity factor range (SIF)) was shown to approach zero beyond a 'critical' crack length [13] which depends on the loading conditions and orientation of the crack [14].…”

Section: Background and Motivationmentioning

confidence: 99%

Analysis of surface crack growth under rolling contact fatigue

Canadinç

Şehitoğlu

Verzal

2008

International Journal of Fatigue

View full text Add to dashboard Cite

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.

show abstract

Section: Background and Motivationmentioning

confidence: 99%

Analysis of surface crack growth under rolling contact fatigue

Canadinç

Şehitoğlu

Verzal

2008

International Journal of Fatigue

View full text Add to dashboard Cite

show abstract

“…Coy et al [8] applied the Lundberg-Palmgren model [9] to analyze the dynamic capacity and surface fatigue life of spur and helical gears. Keer et al [10,11] analyzed subsurface and surface cracking due to Hertzian contact and suggested a pitting model for rolling contact fatigue using a half-space condition, Hertzian stress theory and the body force method in conjunction with a Paris law (2D fracture mechanics). Murakami et al [12] analyzed surface crack propagation on a lubricated rolling contact using the body force method in conjunction with finite element analysis.…”

Section: Introductionmentioning

confidence: 99%

Time domain-based gear contact fatigue analysis of a wind turbine drivetrain under dynamic conditions

Dong

Xing

Moan

et al. 2013

International Journal of Fatigue

View full text Add to dashboard Cite

a b s t r a c tThis paper presents a general approach to predict the contact fatigue life of the gears in the drive-train system of a wind turbine under dynamic conditions. A simplified predictive pitting model that estimates service lives is presented and validated by comparisons with published experimental evidence. Finally, the predictive model is used to estimate the contact fatigue lives of the sun gear and planetary gears in the drive-train system of the National Renewable Energy Laboratory's 750 kW land-based wind turbine based on time domain simulations. The occurrence frequencies of different wind speeds are described by the generalized gamma distribution. The time series of the torques in the main shaft are obtained from a global dynamic response analysis of the wind turbine. The time series of the gear contact forces is obtained from a dynamic analysis of the gearbox using multi-body simulation. The two-parameter Weibull distribution, the three-parameter Weibull distribution, and the generalized-gamma distribution are used to fit the long-term probabilistic distribution of the gear tooth contact pressures. The case study shows the validity of the approach presented in this paper.

show abstract

“…[1][2][3][4][5][6]). Cracks can nucleate both at the contact surface and subsurface, generally in the presence of defects [7]. Also in the latter case, they can grow under repeated contact loading to produce surface-breaking cracks, which, clear symptom of RCF, have been the focus of much of the existing research.…”

Section: Introductionmentioning

confidence: 99%

A coupled approach for rolling contact fatigue cracks in the hydrodynamic lubrication regime: The importance of fluid/solid interactions

Balcombe

Fowell

Olver

et al. 2011

Wear

View full text Add to dashboard Cite

This article presents a novel approach for modelling rolling contact fatigue cracks in the presence of lubricants. The proposed formulation captures the interaction between fluid pressure and solid deflections both at the contact interface and along the crack faces using a fully coupled finite volume/boundary element solver. This enables shedding light on the mechanisms which govern crack propagation in various loading conditions and geometrical configurations. It is shown that by linking the fluid behaviour and the elastic deflections within the crack to the film formed at the contact interface it is possible to overcome one of the main limitations of classical models available in the literature, which consists in having to prescribe pressure and/or pressure gradient at the crack mouth during the each loading cycle. The application of linear elastic fracture mechanics principles for the determination of crack stress intensity factors suggests that the results obtained using the approach developed by the authors produce a more realistic characterisation of the crack tip behaviour and it is capable of producing an improved estimate of crack propagation rates. Implications of these findings for the development of rolling contact fatigue lifing tools and potential extensions of the technique are also discussed.

show abstract

Subsurface and Surface Cracking Due to Hertzian Contact

Cited by 127 publications

References 0 publications

Analysis of surface crack growth under rolling contact fatigue

Analysis of surface crack growth under rolling contact fatigue

Time domain-based gear contact fatigue analysis of a wind turbine drivetrain under dynamic conditions

A coupled approach for rolling contact fatigue cracks in the hydrodynamic lubrication regime: The importance of fluid/solid interactions

Contact Info

Product

Resources

About