Evaluating the biaxial strength, stiffness and stress-strain properties of materials and products

What is an Axial Torsion Test?

Combined axial and torsional loading, or biaxial tests are common to metals testing, biomechanics, tissue engineering, orthopedics and composites testing applications. Axial torsion tests involve simultaneous axial torsional loading which may be monotonic or cyclic in nature.

Get application support
Luer Axial Torsion Test

What is the Purpose of Axial Torsion Biaxial Testing?

Axial torsion tests replicate anticipated or recorded service loading conditions that involve combinations of axial or linear loading with torsional or rotary loading. They are also used by materials developers to characterize the behavior of materials over a wide range of loading ratios. Combined biaxial (axial/torsional) testing is based on an accurate simulation of the multiaxial stress states of real-world operating conditions.

Common Axial Torsion Tests:

In metals testing, relatively high force/torque test machines are involved to generate constitutive modeling of tubular test samples. By changing the ratio of loading to torsional loading and by using special extensometers, the material properties researcher can develop a model of how a material behaves under various loading combinations.

The medical industry has multiple applications, including the case of medical implants, where axial torsional fatigue test machines are involved in hospitals where medical surgeons want more and better understanding to support leading edge developments and solutions for specific patient problems. There are also quite a few industry standards where combined loading is needed, including the spine, the knee, the hip, the shoulder and other joints.

In the case of luer connectors, biaxial combined axial torsional tests involve combined loading (axial plus torsion) to prove they are a reliable connection.

Test Standards

  • ISO 80369-1 Axial Torsional Luer Connector Test Equipment
  • ISO 594-1 & 2 Separation Force and Unscrewing Torque Testing for Luer Tapers
  • ASTM F543 Medical Bone Screw Torsion Test Equipment
  • ASTM F2077 Fatigue Compression Torsion Shear Intervertebral Fusion Device Test Equipment
  • ASTM F1717 Spinal Implant Static and Fatigue Test Equipment
  • ASTM E2207 Axial-Torsional Fatigue Thin-Walled Tubular Materials Test Equipment


  • Axial Torsional Testing of Spinal Implants
  • Medical Bone Screw | Mechanical Test Equipment
  • Metals Testing - Axial Torsion | Equipment
  • Spinal Implant & Devices Axial Torsional Test Equipment | TestResources
  • Biomedical
    • Luer fittings - leakage and separation forces (ISO 80369, ISO 594)
    • Metallic Medical Bone Screws (ASTM F543)
    • Syringes (ISO 7886-1, ISO 8537-C, ISO 11040-4, ISO 11608-5)
    • Child-Proof Pharmaceutical Bottles (ASTM D7860)
    • Adhesive properties of biomaterials
    • Orthopedic research of bones, tissues, joints including spine, hip, knee, shoulder, wrist, finger, ankle, foot & osteosynthesis.
    • Medical device and implant certification for static and fatigue life endurance including ISO 7206, ASTM F2068, F1717, F2077, F2267, F1798, and ISO 12189.
  • Engineering Teaching
    • Constitutive modeling
    • Thin walled tubing
    • Engineering Mechanics
    • Biomedical
  • Characterization of materials including polymers, metals, ceramics, cement and adhesives, shape memory alloys, coatings, ceramics and composites.
  • Wire
  • Tools
  • Fasteners
  • Shafts
  • Consumer Products
  • Electronics
  • Research institutions
  • Simulating real life stresses (multiaxial)
  • Product durability under biaxial loading
  • Combining different test modes to speed development

You Can Pick Your Axial Torsion Test Machine in 4 Easy Steps

First, select your frame (Step 1), then complete your system by selecting your controller software(Step 2) & accessories(Step 3). Choose from a wide range of controller software packages, grips, fixtures, chambers, video extensometers and more, are all designed to perform thousands of ASTM, ISO, EN and DIN industry standard test methods.

When you're ready to complete your system, contact us(Step 4), and an application expert will help you optimize your system to your test requirements and budget.

Start by Selecting Your Frame

Axial Torsion Test Machines

Axial Torsion Test Machines

Axial Load Capacity: 0.8 to 300 kN (180 to 67000 lbf)
Torsion Capacity: 1 to 300 Nm (9 to 2655 in-lb)

Choose from 15 different models with 100’s of configurations which allows you to optimize your testing capabilities and pick exactly what you need. While other companies only have 4 or 5 frames to choose from, our extensive product line of axial torsion test machines gives you the options you have been craving for.

Shop Axial Torsion Test Frames