Advanced Dynamic Triaxial Testing System

Product Code : DYNTTS

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 5Hz. 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 5Hz.
Key features Benefits to the user
High accuracy electro-mechanical control: The DYNTTS system is capable of very small strain static tests through to large strain dynamic tests.
Interchangeable load cells: Allows user to accommodate very soft to very stiff soils with ranges of 1, 2, 4, 8, 10, 16, 25, 40 and 60kN.
In-built balanced ram (up to 5Hz systems): Keeps cell pressure constant during cycling, meaning a dynamic pressure controller is not required (unless dynamic cycling of cell pressure is required).
Interchangeable pedestals and triaxial extension top caps: Allows testing of 38, 50, 70 and 100mm diameter test specimens in the same cell.
Direct closed loop of axial displacement & axial force: Accurate control in either axial displacement or axial force mode.

High accuracy electromechanical

Axial Force Accuracy


Axial Force Accuracy

24bit (i.e. <0.4N for 10kN load cell, <1.5N for 40kN load cell)

Axial Load

10, 40 or 60

Computer Interface


Displacement Range


Displacement Resolution


Operating Frequency (Hz)


Pressure Range (MPa)

2, 4

Sample Sizes

38, 39.1, 50, 61.8, 70, 100, 101, 150, 300mm

  • Temperature Controlled Testing: -10°C to +60°C, -20oC to +65oC,  -20°C to +85°C (The heater and chiller units used have a resolution of 0.01°C with a bath stability of +/-0.05°C, this stability & resolution is not necessarily reflected in the cell).
  • Available in 10kN, 40kN or 60kN.
  • Optional upgrade to cell capable of taking 150mm samples.
  • Optional cell upgrade from 2MPa (standard) to 4MPa
  • Bender Element System (Vertical, Horizontal, S and P waves)
  • Hall Effect local Strain
  • LVDT Local Strain
  • Unsaturated Testing