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Cardiovascular system and artificial replacements

Biaxial testing machine for soft tissue and elastomer mechanical testing

Project description:

Anisotropic materials require multiaxial mechanical testing within material parameters estimation. The laboratory is equipped with biaxial tensile testing machine Zwick/Roell optimized for soft tissues (arteries, veins, ligaments, skin etc.) and elastomers.

Technical data

  • Loading

Loading direction: tension/compression
Loading axes: uniaxial; biaxial, on demand we can change the set up to in-plane tension
+ out-of plane scratch
Loading function: monotonic, cyclic, relaxation, creep, and full prescribed time dependence


  • Load cell



-50N to +50N
-250N to +250N
U9B HBM Data sheet



  • Extensometers

Internal: laser interferometry (Zwick/Roell) or videoextensometer (Zwick/Roell)

External: high-speed camera (Dantec Dynamics)


  • Actuators

4x travel 70mm
0 – 30mm/s
resolution 1um


  • Sampling rate   

internal 500Hz
external record 100Hz

Contact person – Lukas Horny
Location – Cardiovascular laboratory


Homepage of the companny (Zwick/Roell, division Messphysik).


Examples of experiments

Uniaxial tensile test of silicon-textile (PES) composite reinforced with NiTi filament.

Uniaxial tensile test with fine NiTi wire.

Pull-out test of NiTi fiber and silicon-textile matrix to determine quality of adhesive bond between fiber and matrix.

Sample of human pericardium under uniaxial tension.

Sample of a latex in uniaxial tension for comparison between different extensomoter methodologis - 1. 2D digital image correlation (B/W spary on the surface); 2. built-in videoextensometer (B/W strips); and 3. FBG sensor (optical fiber is protruded out of the sample).

Biaxial tensile test with a rubber (equbiaxial deformation).

Reference and deformed state of rubber sample under biaxail tension (B/W strips are for videoextensometer, B/W fine pattern is also speayed onto sample to conduct 2D DIC strain measurement).

doc. Ing. Lukáš Horný Ph.D. Hynek Chlup