GDS Instruments (A division of Global Digital Systems Ltd)
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GDS - Model GDSTTA -True Triaxial Apparatus
The GDS True Triaxial Apparatus (GDSTTA) has the defining characteristic that, unlike conventional triaxial apparatus, all three principal stresses can be controlled independently, rather than just two in a conventional triaxial system. This allows a wider range of complex stress paths to be performed. This dynamic cyclic system is powered by advanced electro-mechanical actuators. Vertical and one horizontal axis are loaded via the dynamic actuators (axis 1 and 2), stress control is provided for the 2nd horizontal axis, (axis 3) via cell pressure.
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- Key features : Benefits to the user
- Stress or strain is applied to a 75mm x 75mm x 150mm sample independently on three axes: : Two pairs of matched dynamic rams for axes 1 and 2, and a confining fluid provides pressure for the 3rd axis on load readings.
- Ram specification: : Each ram has its own internal submersible load cell and displacement transducer to ensure friction effects are minimised.
- Electro-mechanical actuators as standard: : Electro-mechanical actuators provide an easier to use and environmentally friendly solution for accurate testing to 5Hz. Electro-mechanical actuators do not require a hydraulic power pack to be present, hence no requirement to service a powerpack or to protect system users from noise generated by a powerpack.
- Sample preparation: : Full sample preparation equipment for cohesive and non-cohesive samples is provided with the system including a specially designed soil lathe for producing cuboidal samples.
- Actuators : 4
- Axial Force Accuracy : 0.1% FRO
- Axial Force Accuracy : Dependent on range
- Computer Interface : USB
- Data Acquisition : 24 Bit
- Dimensions : 2250mm tall, 1750mm wide, 550mm deep
- Displacement Accuracy : 0.1% FRO
- Displacement Range : 50mm per actuator (100mm per axis)
- Displacement Resolution : <0.0001mm
- Load Range (kN) : 20 (Electro-mechanical)
- Operating Frequency (Hz) : 5
- Power : 3-Phase Power supply required: 380V-415V, 50Hz/60Hz. Maximum current capacity 64 Amp. Note: GDS provides a 3-phase power socket with neutral and earth for wall mounting.
- Pressure Accuracy : Dependent on chosen pressure controller
- Pressure Range (MPa) : 1
- Sample Sizes : 75 x 75 x 150mm