Analysis of Mode II Crack Growth Behavior in Spalling Failure of Backup Roll.

Ohkomori, Yoshihiro; Sakae, Chu; Murakami, Yukitaka

doi:10.2472/jsms.50.249

Cited by 12 publications

(11 citation statements)

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“…Finally, the solution given by the present WF was compared with the one given by Ohkomori et al 31 . for a 3D penny‐shaped crack laying parallel to the contact surface, in the geometry and Hertz load conditions summarized in Fig.…”

Section: A New Wf For a Subsurface Crack Propagating In Mode IImentioning

confidence: 99%

“… Comparison of the dimensionless mode II SIF calculated by the present WF for a 2D subsurface crack in Hertz loading condition with the one calculated by Ohkomori et al 31 . by the body forces method in the same loading condition and geometry for a 3D subsurface penny shaped crack.…”

Section: A New Wf For a Subsurface Crack Propagating In Mode IImentioning

confidence: 99%

“…The effective SIF variation Δ K II eff can be estimated from the Δ K II calculated in frictionless crack faces contact as follows: where g ( f c , σ z ) is a corrective parameter depending in general on f c and on the σ z stresses in the crack region. Some authors provided some solutions for g ( f c , σ z ) in some limited cases of Hertz contact pressure with Coulomb friction: 5,20,31 even if a complete map of g ( f c , σ z ) is not available, some general trends can be obtained by these studies:…”

Section: Application To An Experimental Casementioning

confidence: 99%

“…Typically, this cases occur when both following condition are established: (1) the crack is very close to the contact surface; (2) the extension of the contact load distribution is narrow with respect to the crack size, and/or high surface tangential traction are present. Finally, the solution given by the present WF was compared with the one given by Ohkomori et al 31 for a 3D penny-shaped crack laying parallel to the contact surface, in the geometry and Hertz load conditions summarized in Fig. 10; the solution is given for the leading tip (correspondent to the right tip in Fig.…”

Section: Validationmentioning

confidence: 99%

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A numerical approach to subsurface crack propagation assessment in rolling contact

Mazzù

2013

Fatigue Fract Eng Mat Struct

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Subsurface crack mode II propagation parallel to the contact surface is a damage mechanism leading to dramatic failure in many components subjected to cyclic loading. A weight function (WF) was elaborated for calculating the applied mode II stress intensity factor (SIF) of a crack in a two‐dimensional half‐space in plane strain condition, for crack completely closed and frictionless contact between the crack faces. With respect to other methods, the WF allows faster SIF calculation, thus being suitable for simulation of many repeated load cycles and fatigue crack propagation. The WF was applied for simulating a case of rolling contact experiments found in the literature, and good agreement between experimental and numerical results was obtained, showing the effectiveness of the WF method in damage tolerant design.

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Section: A New Wf For a Subsurface Crack Propagating In Mode IImentioning

confidence: 99%

Section: A New Wf For a Subsurface Crack Propagating In Mode IImentioning

confidence: 99%

Section: Application To An Experimental Casementioning

confidence: 99%

Section: Validationmentioning

confidence: 99%

See 2 more Smart Citations

A numerical approach to subsurface crack propagation assessment in rolling contact

Mazzù

2013

Fatigue Fract Eng Mat Struct

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“…With the aim of improving the RCF strength, considerable efforts have been made especially in improving the cleanness of material [1,2]. However, the improvement of cleanness does not result in the improvement of the strength in case that nonmetallic inclusions no longer affect the crack initiation in RCF process [3,4].…”

Section: Introductionmentioning

confidence: 99%

Shear-mode Crack Initiation Behavior in the Martensitic and Bainitic Microstructures

Wada

Yoshimura

Yamamoto³

et al. 2018

MATEC Web Conf.

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Abstract. Fully reversed torsional fatigue tests were conducted to elucidate the behaviour of shear-mode crack initiation and propagation in one martensitic and two bainitic steels. The relationship between the crack initiation site and microstructure was investigated by means of an electron backscatter diffraction (EBSD) technique. From the S-N diagram, two notable results were obtained: (i) the shear-mode crack was initiated on the prior austenitic grain boundary in martensitic steel, while in bainitic steels, the crack was initiated along the {110} plane; one of the slip planes of bcc metals, and (ii) the torsional fatigue limit of lower bainitic steel with finer grains was 60 MPa higher than that of upper bainitic steel with coarser grains even though the hardnesses were nearly equivalent. The mechanism determining the torsional fatigue strength in these steels is discussed from the viewpoint of microstructure morphology.

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Stress Concentration at Cracks

Murakami

2016

Theory of Elasticity and Stress Concentration

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Analysis of Mode II Crack Growth Behavior in Spalling Failure of Backup Roll.

Cited by 12 publications

References 0 publications

A numerical approach to subsurface crack propagation assessment in rolling contact

A numerical approach to subsurface crack propagation assessment in rolling contact

Shear-mode Crack Initiation Behavior in the Martensitic and Bainitic Microstructures

Stress Concentration at Cracks

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