Biaxial test bench

- Capacity of 100 kN
- Stroke of 150 mm
- Frequency up to 20 Hz
- Static and dynamic testing
- Static clamps up to a width of 50 mm


The biaxial test rig developed at the VUB has a capacity of 100kN in each perpendicular direction, but only in tension, limiting the experimental results to the first quadrant of the two dimensional stress space. As we are using cylinders without hydrostatic bearings, failure or slip in one arm of the specimen will result in sudden radial forces which could seriously damage the servo-hydraulic cylinders and load cells. To prevent this, hinges were used to connect the specimen to the load cells and the servo-hydraulic cylinders to the test frame. Using four hinges in each loading direction results in an unstable situation in compression and consequently only tension loads can be applied. The stroke of the cylinders is 150mm. The loading may be static or dynamic up to a frequency of 20Hz. Each cylinder is independently controlled and any type of loading waveform, including spectral sequences of variable amplitude, can be efficiently introduced using the dedicated software and control system.

Examples of results

- Biaxial testing of aluminium
- Biaxial testing of composite materials (e.g. carbonfibre/epoxy, glassfibre/epoxy)
- Biaxial testing of tissues

Design and implementation by aware