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 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).
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

10kN, 20kN, 25kN, 40kN or 60kN

Computer Interface


Displacement Range


Displacement Resolution


Operating Frequency (Hz)

See pressure ranges

Pressure Range (MPa)

2Hz - 10kN to 60kN - 2MPa, 5Hz - 10kN to 60kN - 2MPa

Resolution of Measurement and Control

10kHz control cycle

Sample Sizes

up to 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 2Hz, 5Hz or 10Hz
  • Available in 10kN , 25kN, 40kN or 60kN.
  • Optional upgrade to cell capable of taking 150mm samples.
  • Optional cell upgrade from 2MPa (standard) to 5MPa
  • Bender Element System (Vertical, Horizontal, S and P waves)
  • Hall Effect local Strain
  • LVDT Local Strain
  • Unsaturated Testing