Description
The VJ Tech Dynamic Cyclic Simple Shear System with Confining Pressure (DSS-C) is an innovative, high-precision instrument designed for advanced geotechnical testing. This apparatus features two electro-mechanical dynamic actuators, adept at applying precise vertical and horizontal loads to the sample. The sample can be either held under pressure in a modified triaxial-type cell or contained within confining rings without pressure.
These dynamic actuators are meticulously controlled by the Dual Axis Dynamic Servo Controller (DSC3000MM), which ensures seamless integration with the PC for enhanced control and data analysis via our Clisp Studio software. The apparatus is equipped with high-precision Encoders which are integrated into the servo motors, as well as external displacement sensors to accurately measure vertical and horizontal displacements. It boasts a safeguarded maximum travel range in each axis, protected by limit switches while allowing for easy adjustment of strain rate via PC.
The system is typically used with VJ Tech Hydraulic APCs, offering precise control and measurement of both Back Pressure and Cell Pressure. It also measures Vertical and Horizontal Loads and Pore Water Pressure through the DSC3000MM up to 4000 points per cycle or 500/second. The accompanying Clisp Studio csDYNSS-C software facilitates an effortless setup and execution of various test stages including Saturation, Consolidation (Isotropic, Anisotropic, or K0), Static Loading, Cyclic Shear (Stress or Strain), and Liquefaction. This comprehensive software ensures a streamlined and efficient testing process, making the VJ Tech Dynamic Cyclic Simple Shear System with Confining Pressure an essential tool for comprehensive soil analysis and research.
Main Features
• High Stiffness with low compliance
• Capable of Cyclic Simple Shear tests using the stainless steel/hard anodised assembly
• Capable of Cyclic Simple Shear tests using Cell Pressure instead of Rings
• 10kN Vertical and Horizontal Load
• Active height control
• Closed Loop Control
• Adaptive PID (Peak and Trough Control)
• USB or Ethernet connectivity for PC Control
• High-Speed sensor conversion (24-bit, 500Hz)
• Electro-mechanical control using the DSC3000MM for Vertical and Horizontal loading
• Data Logging Rate (200 Points/Cycle or 500 Points/Sec)
• Full control from a PC (running Clisp Studio)
• Waveforms available: Sinusoidal, Triangular, Square, Haversine, Saw Tooth, User Defined
• Supplied with all transducer and load cell brackets
• Low friction retaining rings for specimen confinement when conducting simple shear tests
• Pore pressure, Cell Pressure, and Back Pressure measurement
Technical Specifications
| Frequency Range | ‘0.0001 – 10.0000 Hz |
| Max. Dynamic Load | +/- 10 kN (load limited to specification of load cell) |
| Max. Horizontal Travel | +/- 20 mm |
| Max. Vertical Travel | +/- 15 mm |
| Max. Confining Pressure | Up to 2000 kPa |
| Max. Back Pressure | Up to 2000 kPa |
| Sample Diameter | 50, 70 or 100 mm (70mm dia max. for use with confining rings) |
| Nominal Sample Height | 26 mm (or 38 mm for 100 mm) |
| PC Interface | USB or Ethernet |
Tests Performed
• Dynamic Cyclic Simple Shear with Confining Pressure
• Cyclic Simple Shear test (various control methods available in both axes in force, displacement, stress, and height control)
• Static Simple Shear test (with active height control)
Standards
ASTM D6528 ASTM D8296
Ordering Information
Main System Components
| VJT2831-110 | Dynamic Simple Shear with Confining Pressure Apparatus |
| VJT-DSC3000MM | Dynamic Servo Controller (Dual Axis – up to 8 Input Channels per Axis) |
| VJT2266-P | Pro Hydraulic APC (1000 kPa) (x2) |
Transducers
| MET0097 | 2 Internal Load Cells (5 kN) |
| VJT0271/DYN | LSCT Transducer (Dynamic 25 mm) |
| VJT0272/DYN | LSCT Transducer (Dynamic 50 mm) |
| VJT0250/DYN | PWP Transducer (Dynamic 1 MPa) |
| VJT0250-G | Remote Cell Pressure sensor (1 Mpa) |
Accessories
| VJT2831-100-70S | 70 mm Skirted Sample Kit |
| VJT2831-100-100S | 100 mm Skirted Sample Kit |
| VJT2831-100-70R | 70 mm Confining Ring Sample Kit |
| VJT0280 | De-airing block (x2) |
| MIS0166D | Single Channel Signal Conditioning Card |
| VJT-PC-RACK | Rack Mounted PC (Optional) |
| VJT-PSU0015 | Isolation Transformer 230VAC with Cables |
| VJT-PSU0015-110 | Isolation Transformer 110VAC with Cables |
Software
| VJT-csDYNSS-C | Clisp Studio Dynamic Simple Shear with Confining Pressure Software |
