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Apparatus
Apparatus Info
Apparatus Name
Griggs solid-medium piston-cylinder apparatus
Apparatus Type
Triaxial (conventional)
Location
Texas A&M Handin lab 358
Apparatus ID
Griggs Rig
Description
This Griggs triaxial piston-cylinder apparatus can deform 5 mm diameter by 10 mm length single crystal and rock samples in conventional triaxial compression at confining pressures from 500 to 1500 MPa, temperatures from 500 to 950 °C, and strain rates from 10-4 to 10-7 s-1. Temperature and stress resolution of experiments depend on sample assembly materials and design. Calibrations are available for solid and molten salt assemblies, based on comparisons with triaxial gas apparatus results for uniform commercial metal standards, for stress resolutions of +/-30 MPa (using the solid salt assembly) and +/-10 MPa (using the molten salt assembly). Silicate melt assemblies are in development to achieve higher temperatures and low-reactivity chemical sample assembly environments.
Apparatus Features
Loading; Unloading; Heating; High Temperature; High Pressure; Ultra-High Pressure; Elasticity; Elastic Moduli; Yield Strength; Failure Strength; Strength; Creep; Triaxial Stress/Strain; Differential Stress
Apparatus Parameters
Name
Minimum
Maximum
Unit
Prefix
Detail/Note
Confining Pressure
500
1500
MPa
-
Temperature
500
950
degC
-
Loading Rate
1e-7
1e-4
sec-1
-
Apparatus Documents
Document Type
Picture
Document Format
jpg
File
https://strabospot.org/i/ab4f3212-0056-4596-84e0-446236139328/Griggs Rig.jpg
Document ID
Description
Back
Document Type
*
Manual
Diagram
Picture
Video
Data
Software
ASTM
Publication
Other
Document Format
*
jpg
png
txt
csv
zip
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*
Document ID
Description
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Confining Pressure
Effective Pressure
Pore Pressure
Temperature
σ1-Displacement
σ2-Displacement
σ3-Displacement
σ1-Load
σ2-Load
σ3-Load
Displacement Rate
Loading Rate
Stiffness
Sample Diameter
Sample Length
Permeability
degC
degK
sec
min
hour
Volt
mV
Amperage
mA
Ohm
Pa
MPa
GPa
bar
kbar
N
kN
g
mg
μg
m
cm
mm
μm
Hz
kHz
MHz
Pa·s
Darcy
mDarcy
m-1
m2
milistrain
mm·sec-1
N·sec-1
sec-1
kN·mm-1
%
count
cc
mm3
1E+1
1E+2
1E+3
1E+4
1E+5
1E+6
-
1E-1
1E-2
1E-3
1E-4
1E-5
1E-6