Servo-hydraulic dual axis materials testing machine ideal for fatigue testing.

A materials testing machine that can be used to apply torsion and axial loading simultaneously has been used for material and structural characterisation of soft and skeletal tissue, and for the mechanical characterisation of surgical systems. 

Instron 8874

Technical Specifications

Load capacity: ±25 kN
Torque capacity: ±100 Nm
Axial stroke: 100mm
Rotation: ±130 °

Controller and Software

The 8874 is supplied with a two-axis digital 8800 controller provideing full system control, including features such as automatic loop tuning, amplitude control specimen protect, 19-bit resolution across the full range of transducers, and patented adaptive control technology. It also allows access to WaveMatrix™ dynamic testing software, Bluehill® software for axial static tests, and other application specific software, such as the Low Cycle Fatigue or Fracture Mechanics suite.


- Compression platens
- 3p and 4p bending fixtures
- Hydraulic wedge grips
Spinal implant fixtures
- Multiple bespoke fixtures


Data acquisition using Instron’s embedded system and patented Biaxial Dynacell™

- Axial force
- Torque
- Displacement
- Angle of twist

LVDTs (RDP Electronics Ltd)

- D6/00500A
- DCWV500A-L50


- High-speed video


Bonner TJ, Newell N, Karunaratne A, et al. Strain-rate sensitivity of the lateral collateral ligament of the knee. J Mech Behav Biomed Mater 2015;41:261–70. doi:10.1016/j.jmbbm.2014.07.004

Cheong VS, Karunaratne A, Amis AA, et al. Strain rate dependency of fractures of immature bone. J Mech Behav Biomed Mater 2017;66:68–76. doi:10.1016/j.jmbbm.2016.10.023

Newell N, Carpanen D, Grigoriadis G, et al. Material properties of human lumbar intervertebral discs across strain rates. Spine J 2019;19:2013–24. doi:10.1016/j.spinee.2019.07.012

Grigoriadis G, Newell N, Carpanen D, et al. Material properties of the heel fat pad across strain rates. J Mech Behav Biomed Mater 2017;65:398–407. doi:10.1016/j.jmbbm.2016.09.003

Newell N, Grigoriadis G, Christou A, et al. Material properties of bovine intervertebral discs across strain rates. J Mech Behav Biomed Mater 2016;65:824–30. doi:10.1016/j.jmbbm.2016.10.012

Carpanen D, Masouros SD, Stinner DJ. Biomechanical evaluation of a tool-less external fixator. BMJ Mil Heal 2021;:bmjmilitary-2020-001766. doi:10.1136/bmjmilitary-2020-001766