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.
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| Feature | Benefit |
|---|---|
| Extremely high stiffness with very low compliance | Greatly improves stability and repeatability of results |
| Multi-axis load cell for shear force and axial load | Positioning a load cell directly above the sample significantly reduces the influence of mechanical friction on results |
| Switchable between simple shear and direct shear | Enables multiple types of testing using one system |
| Active height and load control | Allows for more advanced testing in research |
| Closed-loop control | Minimises overshoot and improves accuracy |
| Adaptive PID (peak and trough) control | Automatic PID adjustment to suit the sample characteristics, improving precision and tailoring the waveform to the specimen |
| Frame and cross-talk correction available | Improves clarity and resolution of data by eliminating mechanical and electrical noise |
| Independent electro-mechanical control for vertical and horizontal loading axes | Allows stable application of static and cyclic loads without using hydraulics, reducing complexity |
| Interlocked guard compliant with Machinery Directive 2006/42/EC | Improves health and safety by preventing access to moving parts when under test conditions |
- Cyclic and Monotonic Simple Shear test (various control methods available in both axes in force and displacement)
- Direct Shear
- Residual Direct Shear
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 .
A complete sample kit comprising of a Water Bath, Shear Box, Top Cap, Porous Stones, Perforated Plates, Sample Cutter and Dolly
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