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for the civil engineering industry

Building better technology
for the civil engineering industry

Tel: +44 (0)118 945 3737

Tel: +44 (0)118 945 3737

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Dynamic (Cyclic) Simple Shear with Confining Pressure System


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The VJ Tech Dynamic Simple Shear Apparatus with Confining Pressure (DSS-C) utilises 2 electro mechanical dynamic actuators for applying the vertical and horizontal loads to the sample which is held under Pressure in an adapted Triaxial type Cell or a sample contained within Confining Rings and no Confining Pressure
The 2 electro mechanical dynamic actuators are controlled by the Dual Axis Dynamic Servo Controller (DSC3000MM) which is connected via Ethernet or USB to a PC. The vertical and horizontal displacements can be measured with either LSCT Transducers or Encoders which are part of the servo motors. The maximum range of travel in each axis is protected by limit switches and strain rate is easily set from the PC.
Back Pressure is controlled and measured using a Hydraulic APC and Cell Presssure using an Air APC with an Air/Water interface.
Vertical and Horizontal Loads are measure by internal Load Cells. The Loads and Pore Water Pressure are measured via the DSC3000MM.
The controlling software (Clisp Studio csDYNSS-C) enables all stages of the test (Saturation, Consolidation (Isotropic, Anisotropic or K0), Static Loading, Cyclic Shear (Stress or Strain) or Liquefaction) to easily be set up and run.

Dynamic (Cyclic) Simple Shear with Confining Pressure System

System Setup

  • Dynamic (Cyclic) Simple Shear with Confining Pressure Apparatus
  • Dynamic Servo Controller (Dual Axis)
  • Pneumatic Automatic Pressure Controller (Up to 1000 kPa (145 psi))
  • Hydraulic Automatic Pressure Controller (Up to 1000 kPa (145 psi))
  • Air/Water Bladder
  • Transducers (Vertical Load (Internal 5 kN (1124 lbf) Dynamic Load Cell), Horizontal Load (Internal 5 kN (1134 lbf) Dynamic Load Cell), Vertical and Horizontal Displacement (25 mm  (1 inch) LSCT), Pore Water Pressure (10 bar (145 psi))

Features:

  • Ethernet or USB PC Connection
  • Horizontal Force Actuator (consisting of a Servo Motor and Limit Switches)
  • Vertical Force Actuator (consisting of a Servo Motor and Limit Switches)
  • Confining Cell for sample with internal Load Cells (note Cell is capable of 2 MPa (290 psi) Pressure)
  • Axial and Shear stress-strain control
  • Accurate encoder control of axial and shear displacement
  • Sample Assembly Kits available:
  •    Skirted Base Pedestal and Top Cap (70 mm (2.75 inch) or 100 mm 4 inch) diameter sample size)
  •    Confining Ring Base Pedestal and Top Cap 70 mm diameter sample size
  • The following tests can be performed
    • Saturation, Consolidation and Static Load Control
    • Saturation, Consolidation and Dynamic (Cyclic) Shear Control
    • Saturation, Consolidation and Liquefaction

Detailed product specifications

Max. Frequency     
5 Hz (upgradeable to 10 Hz) 
Max. Dynamic Load       
+/- 5 kN (upgradeable to 10 kN) 
Max. Confining Pressure  
Up to 2000 kPa 
Max. Back Pressure   Up to 2000 kPa
Sample Diameter  70 mm (or 100 mm on request) 
Nominal Sample Height  26 mm (or 38 mm for 100 mm) 
PC Interface  USB or Ethernet 

Product Documentation

Dynamic (Cyclic) Simple Shear with Confining Pressure Datasheet
Download
Pro Single Automatic Pressure Controller Datasheet
Download
Pro Pneumatic Automatic Pressure Controllers Datasheet
Download
Transducers Datasheet
Download
Air Water Distribution Datasheet
Download

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