Dynamic (Cyclic) Simple Shear DSS

The VJ Tech Dynamic Simple Shear System (DSS) is an advanced, versatile testing solution for Cyclic & Static Direct Simple Shear and Direct Shear tests, cycling at frequencies from 0.0001Hz up to 5Hz.

It is capable of horizontal shear strain of up to 25mm in both the positive and negative direction. Switching between Direct Simple Shear and Direct Shear configurations is easily achieved by swapping confining rings for a water bath and shear box. The system includes an integrated pore water pressure sensor ready for PWP measurement, and local strain and bender element testing can also be undertaken (with additional equipment) for advanced research applications.

FeatureBenefit
Extremely high stiffness with very low complianceGreatly improves stability and repeatability of results
Multi-axis load cell for shear force and axial loadPositioning a load cell directly above the sample significantly reduces the influence of mechanical friction on results
Switchable between simple shear and direct shearEnables multiple types of testing using one system
Active height and load controlAllows for more advanced testing in research
Closed-loop controlMinimises overshoot and improves accuracy
Adaptive PID (peak and trough) controlAutomatic PID adjustment to suit the sample characteristics, improving precision and tailoring the waveform to the specimen
Frame and cross-talk correction availableImproves clarity and resolution of data by eliminating mechanical and electrical noise
Independent electro-mechanical control for vertical and horizontal loading axesAllows stable application of static and cyclic loads without using hydraulics, reducing complexity
Interlocked guard compliant with Machinery Directive 2006/42/ECImproves health and safety by preventing access to moving parts when under test conditions
Horizontal & Vertical Dynamic Frequency Range
0.0001 - 5.0000 Hz
Horizontal & Vertical Dynamic Load
+/- 10 kN
Horizontal Travel
+/- 25 mm
Vertical Travel
+/- 50 mm
Sample Size (Simple Shear)
50, 63.5, 66, 70, 100, and 150 mm diameter with accessories and 12 Confining Low Friction Rings
Sample Size (Direct Shear)
60, 63.5, 70 and 100 mm Optional Diameter/Square Sample boxes, nominal 20 mm height
Cyclic Waveforms
Sinusoidal, Square, Triangular, Haversine, Saw Tooth or User Defined
Electrical Requirement
110-240VAC, 50-60Hz, 1 ph
PC Interface
Ethernet or USB
Test Performed
  • Cyclic and Monotonic Simple Shear test (various control methods available in both axes in force and displacement)
  • Direct Shear
  • Residual Direct Shear
Standards
British
BS1377-7 : 1990
European
BS EN ISO 17892-10 : 2018
American
ASTM D3080-04 ASTM D3080-11 ASTM D6528-07 ASTM D6528-17
Australian
AS1289.6.2.2 : 1998
Item
Description
Cyclic Simple Shear Sample Kits (Rings)

A complete sample kit comprising of a Top Cap, Base Pedestal, set of rings for sample confinement made of uniform thickness with two thicker rings at each end, a sample former and mould clamp for sample assembly, and 1 pack of membranes and O-rings. A variety of diameters up to 70mm are available .

Direct Shear Sample Kits (Shear Box)

A complete sample kit comprising of a Water Bath, Shear Box, Top Cap, Porous Stones, Perforated Plates, Sample Cutter and Dolly

Upgrade Options *
Bender Element Testing
Local Strain Measurement
Pore Water Pressure Measurement
*Upgrade options will require additional hardware. Contact us for more information.

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