High pressure shear strength investigation of an anisotropic mica schist rock

1975 ◽  
Vol 12 (8) ◽  
pp. 219-228 ◽  
Author(s):  
W. Martin McCabe ◽  
Robert M. Koerner
Keyword(s):  
High Pressure ◽  
Shear Strength ◽  
Mica Schist

scholarly journals Comment on “Channel flow, tectonic overpressure, and exhumation of high-pressure rocks in the Greater Himalayas” by Marques et al. (2018)

Solid Earth ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 357-361 ◽  
Author(s):  
John P. Platt
Keyword(s):  
Boundary Condition ◽  
High Pressure ◽  
Shear Strength ◽  
Channel Model ◽  
Permanent Deformation ◽  
Gravity Anomalies ◽  
Return Flow ◽  
Lithostatic Pressure ◽  
Himalayan Orogen ◽  
Upper Boundary

Abstract. The upward-tapering channel model proposed by Marques et al. (2018) for the Himalayas has a “base” that forms part of the subducting footwall and therefore does not close the channel. This configuration does not produce return flow, and no dynamic overpressure develops in the channel. The geometrical and kinematic configuration they actually use for their calculations differs from this and is both geologically and mechanically improbable. In addition, the fixed upper boundary condition in their models is mechanically unrealistic and inconsistent with geological and geophysical constraints from the Himalayan orogen. In reality, the dynamic pressures calculated from their model, which exceed lithostatic pressure by as much as 1.5 GPa, would cause elastic flexure or permanent deformation of the upper plate. I estimate that a flexural upwarp of 50 km of the upper plate would be required to balance forces, which would lead to geologically unrealistic topographic and gravity anomalies. The magnitude of the dynamic overpressure that could be confined is in fact limited by the shear strength of the upper plate in the Himalayas, which is likely to be < 120 MPa.

Measuring the static shear strength of anaerobic adhesives in finite thickness under high pressure

2019 ◽  
pp. 1-18 ◽  
Author(s):  
P. Corigliano ◽  
M. Ragni ◽  
D. Castagnetti ◽  
V. Crupi ◽  
E. Dragoni ◽  
...  
Keyword(s):  
High Pressure ◽  
Shear Strength ◽  
Finite Thickness ◽  
Anaerobic Adhesives ◽  
Static Shear

Study on Shear Strength of Artificial Methane Hydrate

2010 ◽  
Author(s):  
Feng Yu ◽  
Yongchen Song ◽  
Weiguo Liu ◽  
Yanghui Li ◽  
Jiafei Zhao
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Shear Strength ◽  
Strain Rate ◽  
Methane Hydrate ◽  
Confining Pressure ◽  
Test System ◽  
Secant Modulus ◽  
Shear Tests ◽  
Hydrate Reservoir

The production of methane from hydrate reservoir may induce deformation of the hydrate-bearing strata. The research on mechanical properties of methane hydrate and establishing an efficient methane exploitation technology appear very important. In this paper, a low-temperature high-pressure triaxial test system including pressure crystal device (sample preparation system) was developed. A series of triaxial shear tests were carried out on artificial methane hydrate samples. The mechanical behavior was analyzed. The preliminary results show that the shear strength of methane hydrate increases with the increase of confining pressure and strain rate. While it increases with the decrease of temperature. Moreover, the secant modulus increases with the enhancement of strain rate and the decrease of confining pressure.

scholarly journals Relationship between shear strength and surface roughness of double-layered pipes by cold drawing

2021 ◽  
Vol 12 (1) ◽  
pp. 123-131
Author(s):  
Moktan Ahn ◽  
Joonhong Park
Keyword(s):  
Surface Roughness ◽  
High Pressure ◽  
Shear Strength ◽  
Fem Analysis ◽  
Cold Drawing ◽  
Shear Strength Test ◽  
Marine Plants ◽  
Pressure Resistance ◽  
Single Pipe ◽  
The Relationship

Abstract. Pipes applied to marine plants are used in deep-sea environments; therefore, they must be resistant to high pressure and corrosion. Because it is difficult to satisfy both of these factors in a single pipe, studies on a double-layered pipe are continuously being performed. An outer pipe should be made of carbon steel, with high pressure resistance, and an inner pipe should be made of stainless steel, with high corrosion resistance. A pipe formed by combining these two pipes is called a lined pipe. The shear strength of the lined pipe is an important factor because pipe cracking can occur due to stress concentration when two pipes are separated by bending or high pressure. Therefore, various processes have been applied to increase the shear strength. In this paper, we investigate the effect of the surface roughness of the bonding interface on the shear strength. Surface roughness is in units of micrometers, and it cannot be used for finite element method (FEM) analysis. Therefore, surface roughness should be converted into a friction coefficient to perform FEM analysis. The effect of surface roughness on shear strength was studied in the relationship between the results of pressure from FEM analysis and the shear strength test.

A High Pressure-Short Time Shear Strength Analyzer for Lubricants

1985 ◽  
Vol 107 (2) ◽  
pp. 220-223 ◽  
Author(s):  
B. Jacobson
Keyword(s):  
High Pressure ◽  
Shear Strength ◽  
High Speed ◽  
Maximum Pressure ◽  
Strength Increase ◽  
Transient Pressure ◽  
Static Tests ◽  
Speed Test ◽  
Short Time ◽  
The Impact

High pressure rheology of lubricants under transient pressure and shear stress loads is studied experimentally. The total compression time is about 140 μs and the maximum pressure during the impact time is 5.5 GPa. The results from this high speed test apparatus agree well with static tests of the shear strength increase with pressure up to 2.2 GPa.

Sign in / Sign up

Export Citation Format

Share Document