2018 Customer Open Days 13th & 14th September

GDS will be holding two open days in 2018, on Thursday the 13th and Friday the 14th of September at our offices in Hook, Hampshire, UK. We have a host of soil and rock testing apparatus on show to demonstrate, as well as our technical team being on hand to answer any questions you may have.

A list of provisional apparatus on show is listed below...

Triaxial Automated System

The GDS Triaxial Automated System (GDSTAS) is a load frame-based triaxial testing system. The system is configured by choosing from a range of load frames, triaxial cells, pressure controllers and software.

The system can be configured as a multi-station commercial testing apparatus right through to high load rock testing at research level. If an existing system requires upgrading, parts of the GDSTAS system can be incorporated with existing equipment, including those from some other manufacturers).



Advanced Dynamic Triaxial Testing System

The Advanced Dynamic Triaxial Testing System is a high-end, no compromise testing apparatus combining a triaxial cell with a dynamic actuator capable of applying load, deformation and stresses up to 10Hz. The cell itself is screw-driven from an integral base unit housing the motor drive. Axial force and axial deformation are applied through the base of the cell.  

The system can be combined with a dynamic cell pressure actuator such that cell pressures may also be applied dynamically up to fundamental frequency of the machine (i.e. 2Hz, 5Hz or 10Hz).


Automatic Oedometer System

The GDS Automatic Oedometer System (GDSAOS) is the modern replacement for a traditional hanging weight oedometer.

The GDSAOS is a self-contained stepper motor driven unit that can be controlled  either manually using its Smart Keypad or from a PC using the USB interface. There is no requirement for compressed air or manually placed weights. When used with the GDSLAB control and data acquisition software, the GDSAOS can be used for a complete array of tests beyond those which a hanging weight oedometer can perform.



Resonant Column Apparatus

For many years the resonant column apparatus has been used in research and commercial laboratories to estimate values of the shear modulus, G, and damping ratio, D, for soil specimens across the small to medium strain range (< 1 %).

The variation in these parameters with increasing strain magnitude allows engineers to conduct dynamic response analyses, such as those using finite element and non-linear analytical methods, which enable performance assessment of natural and engineered structures subjected to dynamic and cyclic loadings.


Electromechanical Dynamic Cyclic Simple Shear Device 

The GDS Electromechanical Dynamic Cyclic Simple Shear Device (EMDCSS) is for simple shear testing, which can be upgraded to direct shear. It is capable of carrying out dynamic cyclic tests from small strain (0.005% shear strain amplitude) to large strain (10% shear strain amplitude), as well as extremely accurate quasi-static testing. This is the choice for a no-compromise simple shear machine with the greatest range of testing capability. The perfect choice for advanced commercial testing or academic research.


250kN & 100kN Hydraulic Load Frame for Soil & Rock

The GDS Hydraulic Loading Frames (HLF) are load frames with a hydraulic dynamic actuator mounted on the cross beam for axial stress/strain cyclic dynamic loading. The HLF frames are available in 100kN, 250kN, 1000kN and 1500kN loads.
The system is capable of dynamically controlling axial displacement or axial force and can be synchronised with an optional dynamic cell pressure actuator (radial stress), to give an advanced capability of dynamic stress path testing. Using large diameter triaxial cells, the HLF enables tests to be performed on large particle sizes such as ballast.


Large Automated Direct Shear System

GDS Large Automated Direct Shear System (GDSLADS) is an electro-mechanical direct shear testing device for large samples, up to 300mm square or round. Different sample sets can be used to achieve the following types of testing in one system.

  • Standard Direct Shear up to 300x300mm.
  • Geomembrane Shear test.
  • Rock Mechanics sample set.


If you are interested in attending one of our open days whether its to see our entire product range or for a demonstration on one particular apparatus above please register your interest at james@gdsinstruments.com