scholarly journals Nucleation of frictional instability caused by fluid pressurization in subducted blueschist

2016 ◽  
Vol 43 (6) ◽  
pp. 2543-2551 ◽  
Author(s):  
Michiyo Sawai ◽  
André R. Niemeijer ◽  
Oliver Plümper ◽  
Takehiro Hirose ◽  
Christopher J. Spiers
Keyword(s):  
Fluid Pressurization ◽  
Frictional Instability

scholarly journals Compaction front and pore fluid pressurization in horizontally shaken drained granular layers

2020 ◽  
Vol 5 (5) ◽  
Author(s):  
Shahar Ben-Zeev ◽  
Einat Aharonov ◽  
Renaud Toussaint ◽  
Stanislav Parez ◽  
Liran Goren
Keyword(s):  
Pore Fluid ◽  
Fluid Pressurization ◽  
Granular Layers

Permeability of Human Glenohumeral Joint Cartilage

1999 ◽  
Author(s):  
Anna Stankiewicz ◽  
Gerard A. Ateshian ◽  
Louis U. Bigliani ◽  
Van C. Mow
Keyword(s):  
Mechanical Properties ◽  
Articular Cartilage ◽  
Interstitial Fluid ◽  
Glenohumeral Joint ◽  
Solid Matrix ◽  
Joint Cartilage ◽  
Frictional Drag ◽  
Diarthrodial Joints ◽  
Flow Through ◽  
Fluid Pressurization

Abstract The nearly frictionless lubrication in diarthrodial joints and load support within articular cartilage depends on its mechanical properties. It has been shown that the majority of applied loads on cartilage are supported by interstitial fluid pressurization (Ateshian et al., 1994) which results from the frictional drag of flow through the porous permeable solid matrix. The duration and magnitude of this pressurization are a function of the permeability of cartilage (Lai et al., 1981).

scholarly journals Flash Heating and Local Fluid Pressurization Lead to Rapid Weakening in Water‐Saturated Fault Gouges

2018 ◽  
Vol 123 (10) ◽  
pp. 9084-9100 ◽  
Author(s):  
Lu Yao ◽  
Shengli Ma ◽  
Jianye Chen ◽  
Toshihiko Shimamoto ◽  
Honglin He
Keyword(s):  
Fault Gouges ◽  
Fluid Pressurization ◽  
Water Saturated

scholarly journals Hip chondrolabral mechanics during activities of daily living: Role of the labrum and interstitial fluid pressurization

2018 ◽  
Vol 69 ◽  
pp. 113-120 ◽  
Author(s):  
Jocelyn N. Todd ◽  
Travis G. Maak ◽  
Gerard A. Ateshian ◽  
Steve A. Maas ◽  
Jeffrey A. Weiss
Keyword(s):  
Activities Of Daily Living ◽  
Daily Living ◽  
Interstitial Fluid ◽  
Fluid Pressurization

Well Shear Associated with Conventional and Unconventional Operations: Diagnosis and Mechanisms

2021 ◽  
pp. 1-18
Author(s):  
Russell T. Ewy
Keyword(s):  
Cross Sections ◽  
Slip Surface ◽  
Bedding Plane ◽  
Vertical Stress ◽  
Natural Fracture ◽  
Shear Deformations ◽  
Horizontal Fracture ◽  
Bedding Planes ◽  
Shear Slip ◽  
Fluid Pressurization

Summary Wells are sometimes deformed due to geomechanical shear slip, which occurs on a localized slip surface, such as a bedding plane, fault, or natural fracture. This can occur in the overburden above a conventional reservoir (during production) or within an unconventional reservoir (during completion operations). Shear slip will usually deform the casing into a recognizable shape, with lateral offset and two opposite-trending bends, and ovalized cross sections. Multifinger casing caliper tools have a recognizable response to this shape and are especially useful for diagnosing well shear. Certain other tools can also provide evidence for shear deformation. Shear deformations above a depleting, compacting reservoir are usually due to slip on bedding planes. They usually occur at multiple depths and are driven by overburden bending in response to reservoir differential compaction. Shear deformations in unconventional reservoirs, for the examples studied, have been found to be caused by slip on bedding planes and natural fractures. In both cases, models, field data, and physical reasoning suggest that slip occurs primarily due to fluid pressurization of the interface. In the case of bedding plane slip, fracturing pressure greater than the vertical stress (in regions where the vertical stress is the intermediate stress) could lead to propagation of a horizontal fracture, which then slips in shear.

Using FEM to study the frictional instability induced by third-body particles confined in frictional interface

2020 ◽  
Vol 72 (10) ◽  
pp. 1239-1244
Author(s):  
Xiaoyu Yan ◽  
Wei Wang ◽  
Xiaojun Liu ◽  
Jimin Xu ◽  
Lihong Zhu ◽  
...  
Keyword(s):  
Peer Review ◽  
Friction Force ◽  
Rough Surfaces ◽  
Lower Surface ◽  
Third Body ◽  
Content Type ◽  
Frictional Behavior ◽  
Macro Scale ◽  
Frictional Interface ◽  
Frictional Instability

Purpose A finite element method (FEM) model of the frictional behavior of two rough surfaces with a group of third-body particles confined by the surface asperities is established. By monitoring the stress distribution, friction force and the displacement of the surfaces, how the frictional instability is induced by these particles is studied. This modeling job aims to explore the relation between the meso-scale behavior and the macro-scale frictional behavior of these particles. Design/methodology/approach By using FEM, a 2D model of two frictional rough surfaces with a group of elastic or elasto-plastic particles confined by surface asperities is established. The Mises stress, macro friction force and displacements of elements are monitored during compressing and shearing steps. Findings The macro friction coefficient is more stable under higher pressure and smaller under higher shearing speed. The dilatancy of the interface is caused by the elevation effect of the particles sheared on the peak of the lower surface, particles collision and third body supporting. The combined effect of particles motion and surface–surface contact will induce high-frequency displacements of surface units in restricted direction. Originality/value Previous studies about third-body tribology are mainly concentrated on the frictional behavior with large number of particles distributed homogeneously across the interface, but this paper focuses on the behavior of third-body particles confined by surface asperities. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-12-2019-0544/

Effect of Synovial Fluid Pressurization on the Biphasic Lubrication Property of Articular Cartilage

Biotribology ◽  
2019 ◽  
Vol 19 ◽  
pp. 100098
Author(s):  
Shoko Horibata ◽  
Seido Yarimitsu ◽  
Hiromichi Fujie
Keyword(s):  
Articular Cartilage ◽  
Synovial Fluid ◽  
Fluid Pressurization

Development of a 100 MPa water–gas two-phase fluid pressurization device

2020 ◽  
Author(s):  
Shengbin Li ◽  
Heping Li ◽  
Lin Chen ◽  
Hongbin Zhou
Keyword(s):  
Two Phase ◽  
Fluid Pressurization ◽  
Water Gas ◽  
Phase Fluid

scholarly journals Shallow Magmatic Hydrothermal Eruption in April 2018 on Ebinokogen Ioyama Volcano in Kirishima Volcano Group, Kyushu, Japan

Geosciences ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 183 ◽  
Author(s):  
Yasuhisa Tajima ◽  
Setsuya Nakada ◽  
Fukashi Maeno ◽  
Toshio Huruzono ◽  
Masaaki Takahashi ◽  
...  
Keyword(s):  
Hydrothermal System ◽  
Hydrothermal Activity ◽  
Volcanic Field ◽  
Multiple Systems ◽  
Geothermal Activity ◽  
Hydrothermal Eruption ◽  
Kirishima Volcano ◽  
Geophysical Observation ◽  
Under The Volcano ◽  
Fluid Pressurization

The Kirishima Volcano Group is a volcanic field ideal for studying the mechanism of steam-driven eruptions because many eruptions of this type occurred in the historical era and geophysical observation networks have been installed in this volcano. We made regular geothermal observations to understand the hydrothermal activity in Ebinokogen Ioyama Volcano. Geothermal activity resumed around the Ioyama from December 2015. A steam blowout occurred in April 2017, and a hydrothermal eruption occurred in April 2018. Geothermal activity had gradually increased before these events, suggesting intrusion of the magmatic component fluids in the hydrothermal system under the volcano. The April 2018 eruption was a magmatic hydrothermal eruption caused by the injection of magmatic fluids into a very-shallow hydrothermal system as a bottom–up fluid pressurization, although juvenile materials were not identifiable. Additionally, the upwelling of mixed magma–meteoric fluids to the surface as a kick was observed just before the eruption to cause the top–down flashing of April 2018. A series of events was generated in the shallower hydrothermal regime consisting of multiple systems divided by conductive caprock layers.

scholarly journals Tribological Rehydration and Its Role on Frictional Behavior of PVA/GO Hydrogels for Cartilage Replacement Under Migrating and Stationary Contact Conditions

2020 ◽  
Vol 69 (1) ◽  
Author(s):  
Yan Shi ◽  
Dangsheng Xiong ◽  
Jianliang Li ◽  
Long Li ◽  
Qibin Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Articular Cartilage ◽  
Friction Coefficient ◽  
Creep Resistance ◽  
Frictional Coefficient ◽  
Dynamic Mechanical Properties ◽  
Friction Behavior ◽  
Frictional Behavior ◽  
Fluid Pressurization ◽  
Stationary Contact

AbstractGraphene oxide (GO) was incorporated into polyvinyl alcohol (PVA) hydrogel to improve its mechanical and tribological performances for potential articular cartilage replacement application. The compressive mechanical properties, creep resistance, and dynamic mechanical properties of PVA/GO hydrogels with varied GO content were studied. The frictional behavior of PVA/GO hydrogels under stationary and migrating contact configurations during reciprocal and unidirectional sliding movements were investigated. The effects of load, sliding speed, diameter of counterface, and counterface materials on the frictional coefficient of PVA/GO hydrogels were discussed. PVA/0.10wt%GO hydrogel show higher compressive modulus and creep resistance, but moderate friction coefficient. The friction coefficient of PVA/GO hydrogel under stationary and migratory contact configurations greatly depends on interstitial fluid pressurization and tribological rehydration. The friction behavior of PVA/GO hydrogels shows load, speed, and counterface diameter dependence similar to those observed in natural articular cartilage. A low friction coefficient (~ 0.03) was obtained from PVA/0.10wt%GO hydrogel natural cartilage counter pair. Graphical Abstract

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