Stick-slip mechanism in a granular medium

Bobryakov, A. P.

doi:10.1007/s10913-010-0076-8

Cited by 8 publications

(2 citation statements)

References 8 publications

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“…Their displacement jumps present a frictional automatic fluctuation process, which are consistent with the stick-slip mechanism. It shows that the adhesive wear is the main wear mechanism of the 316L and chromized-316L samples [51][52][53]. The COF of chromized-316L increases gradually with the sliding time and tends to be the same as 316L at the end of the friction test, reaching above 0.75.…”

Section: Mechanical and Tribological Propertiesmentioning

confidence: 90%

Structural, tribological and corrosion properties of plasma nitrided-chromized-316L stainless steel in air and artificial seawater

Jing

Cui

et al. 2020

Surf. Topogr.: Metrol. Prop.

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To improve the protective performance of 316L stainless steel surface in seawater, a series of modified layers on the 316L stainless steel were fabricated by plasma nitriding, vacuum solid powder chromizing and duplex surface treatment of nitriding-chromizing, respectively. The microstructure, mechanical properties, tribological properties and corrosion resistance of different modified layers were contrastively investigated. The results of x-ray diffraction (XRD) and transmission electron microscope (TEM) showed that the nitrided layer was mainly CrN and Fe 4 N phases, and the chromized layer was mainly Fe-Cr and Cr 23 C 6 phases. The surface hardness of 316L stainless steel was improved to varying degrees by nitriding and chromizing due to the formation of hard phases such as CrN and Cr 23 C 6 on the surface of 316L. The friction coefficient and wear rate can be obviously reduced by nitriding treatment. However, the nitriding treatment can cause the precipitation of Cr from the solid solution of 316L to form CrN, resulting in the decrease of corrosion resistance in seawater. In contrast, chromizing treatment can significantly improve the corrosion resistance of 316L by increasing the chromium content of stainless steel surface. The duplex surface treatment of nitriding and chromizing made the 316L stainless steel had the highest surface hardness and plastic deformation resistance and showed the excellent tribological properties in both atmosphere and seawater.

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Section: Mechanical and Tribological Propertiesmentioning

confidence: 90%

Structural, tribological and corrosion properties of plasma nitrided-chromized-316L stainless steel in air and artificial seawater

Jing

Cui

et al. 2020

Surf. Topogr.: Metrol. Prop.

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“…In the second model of the earthquake origination and development, the main part in accumulation of elastic energy and high stresses at the edges of lithosphere platforms belong to irregularities that appear at the contact surfaces of moving geoblocks and impeded there free sliding even if their surfaces are relatively smooth. Major obstacle of the free sliding can be hitch of the blocks belonging to opposite surfaces of the fault, or friction and stick-slip on the transfer from slow movement to quick displacements [15]. Any case, the accumulation process will end with maximum stresses, sliding over the contact and partial drop of the load.…”

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confidence: 99%

Modeling simulation of deformation in a blocky geomedium during origination of earthquake

Bobryakov

2011

J Min Sci

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The paper focuses on two models of an earthquake-the dilatancy model and the consolidation and stick-slip model. Experimental basis for the research was measurements of stress-strain state in a granular medium with a movable plate that simulated edges and surfaces of a tectonic fault. The dilatancy model showed the lift of the granular material and the respective accumulation of potential energy. The second model showed that a share of the accumulated energy is elastic energy produced in a blocky medium due to sliding resistance on the surface of faults. The curves of shear stresses and displacements, obtained in soft loading of the plate, showed the stick-slip mechanism with displacement discontinuities and partial drops of stresses. The maximum displacement discontinuity and the highest dynamics on the curves correspond to the maximum value of the accumulated elastic energy which is then released on the descending branch of the curve.

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Stick-slip behaviours of dry glass beads in triaxial compression

Cui

Xiang

et al. 2016

Granular Matter

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Stick-slip mechanism in a granular medium

Cited by 8 publications

References 8 publications

Structural, tribological and corrosion properties of plasma nitrided-chromized-316L stainless steel in air and artificial seawater

Structural, tribological and corrosion properties of plasma nitrided-chromized-316L stainless steel in air and artificial seawater

Modeling simulation of deformation in a blocky geomedium during origination of earthquake

Stick-slip behaviours of dry glass beads in triaxial compression

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