A NEW METHOD FOR THE MEASUREMENT OF MODE II FATIGUE THRESHOLD STRESS INTENSITY FACTOR RANGE Δ<i>K</i><sub>τth</sub>

Murakami, Yukitaka; Hamada, Shigeru

doi:10.1111/j.1460-2695.1997.tb01530.x

Cited by 43 publications

(32 citation statements)

References 22 publications

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“…This is qualitatively consistent with observations made by Murakami and Hamada 16 who performed mode II propagation tests on a rail steel. They observed much rtial local branching’ on the fracture surfaces, inclined approximately 70° to the main crack (so that the mode I stress intensity factor undergone by these aborted branches when they are left behind the main crack tip is probably smaller than that calculated above for a transverse branch, but large similarities between both cases are believed to exist anyway).…”

Section: Discussionsupporting

confidence: 92%

Branch crack development from the flank of a fatigue crack propagating in mode II

Doquet¹,

Frelat²

2001

Fatigue Fract Eng Mat Struct

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The propagation of fatigue cracks in mode II often leads to the development of a branch starting from a crack flank, some distance behind the tip and not to the expected bifurcation at the crack tip. This type of branch is suggested to initiate by decohesion along a secondary slip plane and to grow in mode I due to the tensile component of the mode II stress field. Finite element calculations are performed to evaluate the stress intensity factors for the main crack and the branch as a function of the position of the latter. It is shown that the branch has a substantial shielding effect on the main crack and generates contact forces along its flanks. The simultaneous and competitive growth of the main crack and the branch in fatigue is simulated step by step using kinetic data for mode II and mode I obtained for a maraging steel.

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Section: Discussionsupporting

confidence: 92%

Branch crack development from the flank of a fatigue crack propagating in mode II

Doquet¹,

Frelat²

2001

Fatigue Fract Eng Mat Struct

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“…The Mode II fatigue crack growth tests were conducted by using the specially designed double cantilever (DC) type specimen designed by Murakami and Hamada [6][7][8]. The specimen has a chevron notch and side grooves in the slit.…”

Section: Mode II Fatigue Crack Growth Test In a Vacuummentioning

confidence: 99%

“…Test method details are given in Ref. [6][7][8]. Tests were conducted at a constant load amplitude, ∆P = 11.8 kN with R = -1 and at a frequency of 6 Hz.…”

Section: Mode II Fatigue Crack Growth Test In a Vacuummentioning

confidence: 99%

Fatigue crack path and threshold in Mode II and Mode III loadings

Murakami

Fukushima

Toyama³

et al. 2008

Engineering Fracture Mechanics

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“…On the other hand, Murakami et al [4][5][6][7] devised a method of the experiment and used the double cantilever specimen. They performed the ⊿K Ⅱ -decreasing test by using a shevron-notched SUJ2 specimen.…”

Section: Background Of Researchmentioning

confidence: 99%

Designing of a Testing Machine for Shear-Mode Fatigue Crack Growth

Kusaba

Okazaki

Endo

et al. 2012

Int. J. Mod. Phys. Conf. Ser.

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As recognized, flaking-type failure is one of the serious problems for railroad tracks and bearings. In essence, flaking-type failure is closely related to the growth of the shear-mode (Mode-II and Mode-III) fatigue crack. In our research group, it is demonstrated that a shear-mode fatigue crack can be reproduced for cylindrical specimens by applying the cyclic torsion in the presence of the static axial compressive stress. However, a biaxial servo-hydraulic fatigue testing machine is quite expensive to purchase and costly to maintain. The low testing speed (about 10Hz) of the testing machine further aggravates the situation. As a result, study on shear-mode fatigue crack growth is still in the nascent stage. To overcome the difficulties mentioned above, in this research activity, we developed a high-performance and cost-effective testing machine to reproduce the shear-mode fatigue crack growth by improving the available resonance-type torsion fatigue testing machine. The primary advantage of using the resonance-type torsion fatigue testing machine is costefficiency. In addition, the testing speed effectively can be improved, in comparison with that of a biaxial servo-hydraulic fatigue testing machine. By utilizing the newly-designed testing machine, we have demonstrated that we can successfully reproduce the shear-mode fatigue crack.

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A NEW METHOD FOR THE MEASUREMENT OF MODE II FATIGUE THRESHOLD STRESS INTENSITY FACTOR RANGE ΔK_τth

Cited by 43 publications

References 22 publications

Branch crack development from the flank of a fatigue crack propagating in mode II

Branch crack development from the flank of a fatigue crack propagating in mode II

Fatigue crack path and threshold in Mode II and Mode III loadings

Designing of a Testing Machine for Shear-Mode Fatigue Crack Growth

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A NEW METHOD FOR THE MEASUREMENT OF MODE II FATIGUE THRESHOLD STRESS INTENSITY FACTOR RANGE ΔKτth

Cited by 43 publications

References 22 publications

Branch crack development from the flank of a fatigue crack propagating in mode II

Branch crack development from the flank of a fatigue crack propagating in mode II

Fatigue crack path and threshold in Mode II and Mode III loadings

Designing of a Testing Machine for Shear-Mode Fatigue Crack Growth

Contact Info

Product

Resources

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A NEW METHOD FOR THE MEASUREMENT OF MODE II FATIGUE THRESHOLD STRESS INTENSITY FACTOR RANGE ΔK_τth