Biomedical applications are all subjected to multiaxis mechanical loading during their product lifecycle. Biaxial testing for biomedical applications includes biomaterials, medical device products, pharmaceutical products and implantable devices. Biaxial testing applies active control to both axial load and torque to a specimen and is one of the most common types of multiaxis test in the biomedical industry.
Biaxial testing in the biomedical industry is driven both by standards such as ASTM and ISO, which have added torque and axial requirements to many standards, but also by functional testing from others performing R&D on biomaterials. The prevalence of biaxial testing rises as biomedical companies comply with standards or performance functional testing to meet FDA regulations.
At first look, biaxial testing may seem complicated. Challenges on how to test or what equipment to use become easy when you break things down. Biaxial systems can be categorized into 3 types of systems:
- Axial and torsion combined systems (most common test situation in the biomedical industry)
- Simple biaxial systems capable of monotonic axial loading and torsional loading
- Fatigue systems capable of monotonic, cyclical axial, and torsional loading and control.
It is important to define your specific test requirements based on standards and future product development. For example, an advanced system is required because of the precision and the proper phase control needed for each axis.
The next step is to determine what type of fixturing is needed to grip your specific specimen. It is common to find many samples potted due to irregular specimen geometries in the biomedical industry which makes gripping the specimen difficult. Versatile vise style grips can be used to hold the potted specimen. The ability to grip samples with a variety of shapes and sizes is important for biomedical research because you can test more samples at a faster rate.
There are many benefits of performing biaxial testing to simulate functional product use or to meet ASTM and ISO standards. Our application engineers have extensive knowledge in biaxial testing and can help you get started. Contact us today to start planning for your biaxial testing system.
Recommended Test Machines
Configured to your applications requirements by our application engineer, using a two channel servocontroller, linear actuator, torsional actuator, special biaxial test frame, a software program for controlling and measuring all the test variables, a load cell capable of measuring axial load and torque, position sensors for both actuators, and special test fixtures.
Configured with four actuators mounted opposite of each other on two axes with each actuator independently controlled by a four channel servo controller that ensures independent and synchronized control of motion, strain or load.
Double axis testing system can fit both the static and fatigue dental wear testing requirements.
Additional Options
Simple twist-thrust biaxial tests help evaluate the mechanical performance of tubes, screws, connectors, wires and bottles. TestResources solves these applications in multiple ways that depend on the timing of your torsion add-on. Our systems are inherently modular and flexible which allows you to add the torsion channel upfront or in the field in a short amount of time. Contact us to discuss your options.