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歐美大地 新聞(英文) Company News The GDS Dynamic Rock Triaxial Test System
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The GDS Dynamic Rock Triaxial Test System

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The GDS Dynamic Rock Triaxial Test System has an axial force up to 1.5 MN and a frequency up to 20 Hz. The axial load is loaded by a hydraulic servo actuator.
 
 
Main features of GDS Dynamic Rock Triaxial Test System DT-RTS:
 
● Different loads, pressures and sample sizes are available for different test requirements.
 
● Pressure riser can be provided for sample testing of high pressure triaxial pressure chambers.
 
● Optional acoustic emission and ultrasonic speed test functions.
 
 


 


The GDS Hydraulic Loading Frame (HLF) is fitted with a dynamic hydraulic actuator on the top beam to apply axial loads with optional load ranges of 100, 250, 1000 and 1500 kN.
 
The system is capable of controlling dynamic cyclic displacement or load for axial loading. It can be loaded simultaneously with an optional dynamic confining pressure actuator (radial stress) to achieve advanced functions of dynamic stress path testing.
 
With large-diameter triaxial pressure chambers, HLF can also test large particle size specimens such as gravel.
 
 
Load frame technical parameters:
Computer interface: USB
Loading frequency: 100kN, 250kN, 1000kN-20Hz, 1.5MN - 5Hz
Loading capacity (kN): 100kN, 250kN, 1000kN, 1.5MN
Machine weight (kg): 100kN - 670kg, 250kN - 1280kg, 1000kN - 6500kg, 1.5MN - 7000kg




Optional upgrade:

 

The GDS combines the traditional high-pressure Hoek pressure chamber with advanced Acoustic Emission (AE) and Acoustic Velocity (AV) functions with the following advantages:
 
• Maximum pressure capacity: 70MPa.
• Upgrade options: Acoustic Emission (AE) and Sound Velocity (AV) (horizontal (up to two groups) and vertical)
• Optional sample size: 38.1mm and 50.8mm diameter
• Special rubber film allows AE and AV to be accessed via quick connector
• AV sensor mounted on top hat and base
• Up to 12 AE sensors, 1 vertical AV sensor, and up to 2 horizontal AV sensors per pressure chamber
• Access to the inner cavity through a rubber sleeve with a screw threaded top, the specially designed top plate removes the entire pressure chamber for easy maintenance

 

Acoustic Emission Transducers can be used to record and analyze micro cracks in rock samples during the test. The results can be used to analyze rock fracture mechanisms and determine the initiation threshold.
 
The acoustic emission system is a triggered or a continuous acquisition system. The trigger system has fewer "impact numbers" but the data processing is simple. The continuous acquisition system does not miss any impact and it can be configured with both trigger and continuous data acquisition systems
 



The AV Transducers is mainly used to measure the wave velocity of P wave and S wave in the sample. The applicable pressure and load are generally higher than the bending element system. The AV sensor has the same principle as the bending element, but the piezoelectric ceramic is not exposed to the environment. The applicable confining pressure can reach 100 MPa and the load can reach 2 MN. The sensor is typically mounted on the top cap and base and mounted on the surface of the specimen under special conditions. Each sensor probe contains a compression wave (P wave) component and two shear wave (S wave) components. The shear wave elements are arranged in an orthogonal arrangement, allowing shear waves to be generated in different polarization directions, which indicates that the sample can be transversely isotropic or fully anisotropic.



For more information, please contact Earth Products China Limited.
Service hotline: 400-700-9998
Email: marketing@epc.com.hk
Official website: en.epccn.com