Advanced Triaxial Testing

GDS supply a comprehensive range of triaxial testing systems and to help you choose the right system for your research establishment we have provided some popular static and dynamic system overviews below.

The Triaxial Testing System (GDSTTS) is the system of choice for teaching laboratories and researchers. It is the original automated stress path system created by GDS using a Bishop and Wesley hydraulically actuated cell, where axial stress is applied directly as a stress through a bellofram diaphragm. The system can be configured using Enterprise, Standard or Advanced level pressure controllers.  The smaller 38/50mm cell is for up to 7kN axial force, while the 70/100mm cell can perform up to 25kN.

The Triaxial Automated System (GDSTAS) is a load frame based system where the loading is (generally) via feedback from a velocity controlled load frame. The system can be configured using Enterprise, Standard or Advanced level controllers. This is one of the most configurable systems in the GDS range. By choosing the load frame range, the pressure controller range and the Triaxial cell range appropriately, the system may be configured for soft soils right up to a high pressure rock testing system. The lower range is the system for choice for commercial laboratories, with the upper range the system of choice for rock mechanics laboratories.

UNSAT represents the GDS range of upgrades for performing unsaturated testing.  We offer four types of unsaturated testing, most methods being able to be applied to any GDS triaxial testing system.

 

The Virtual Infinite Stiffness (GDSVIS) is the premier high range load frame in the GDS range. VIS (Virtual Infinite Stiffness) is a unique GDS development. As well as being a very stiff design of load frame, to the observer, and in terms of the test specimen, it allows the axial loading system to operate as though to have infinite stiffness (zero system compliance). 

The Enterprise Level Dynamic System (ELDYN) is the system of choice for teaching establishments and commercial testing. The ELDYN is GDS’s entry level dynamic triaxial testing system. Generally considered to be far superior to pneumatically actuated systems, this electromechanically actuated system is designed to compete with low cost pneumatic systems directly on price, whilst being superior on performance.  

The Dynamic Triaxial Testing System (DYNTTS) is the top level device in the GDS dynamic Triaxial system range. This advanced range of dynamic systems contain the most flexibility in configuration, and the no-compromise approach in terms of accuracy, stability and features that you would expect from GDS. This is the system of choice for advanced research.

The Hydraulic load Frame (GDSHLF) contains a dynamic cell pressure actuator built into the cross beam of the frame. With load capacities up to 100kN and +/- 50 mm stroke capability based around a stiff loading frame. The large diameter cyclic triaxial system (LDCTTS) is a dynamic system based on the GDSHLF, using large diameter triaxial cells to enable tests to be performed such as on large particle sizes such as ballast.