Material Testing
Planar biaxial test machines are increasing in popularity because of their unique ability to generate in-plane stresses that replicate multiaxial real-world stress states. Each planar biaxial system includes 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. Each actuator is controlled to work with the other three actuators to replicate desired biaxial stresses.
Our planar biaxial test systems can be configured with contacting extensometers or a suitably configured DIC (digital image correlation) video camera, which makes strain measurement control possible. The majority of our applications are best served with all-electric actuators. Servohydraulic actuators are recommended for very high loads and for demanding fatigue testing applications. However, if your application requires relatively low forces and your tests are quasi-static or below 15 Hz, then electromechanical and electrodynamic actuators tend to be favored compared to servohydraulics.
174 Series Electromechanical Planar Biaxial test systems provides researchers with new abilities to characterize and evaluate quasi-static performance of high strength materials under planar biaxial loading conditions. You can perform both static and fatigue tests up to 2 Hz with the 174 series test system. The actuator provides accurate test results because of the test control quality due to its backlash free operation.
Each of our systems are provided as a complete test solution and includes self-reacting load frames in capacities ranging from 50 to 200 kN (11,250 lbf to 45,000 lbf). Each actuator features precision position measurement with speeds ranging from 5µm/min to 500 mm per min (20 ipm).
Transducers include load and position encoder based measurements with both contacting and non contacting strain based extensometers available. The video extensometer is based on digital image correlation (DIC) technology.
This system features high precision load and optional strain control on two synchronized axes which makes it possible to create controlled complex biaxial stress and strain test states. The system is programmed for tensile and tension-tension fatigue tests on flat test samples. Our four channel controller controls all four actuators independently to move in opposite directions on two axis perpendicular to each other.
The actuators and load cells are specifically matched to your load and speed application requirements. Each actuator includes high precision noise free digital position encoders. Our 24 bit controller increases resolution for analog transducers such as LVDT, load cell, extensometers. Our controllers set a new performance standard for low noise floor, delivering better than 0.02% on raw data; even better than that when used with the unit's digital filters.
Features
- Capable of tension, compression, shear, stress relaxation, and creep tests
- Test space designed for customer samples and applications
- Four channels of independent load, position and strain control
- Adjustable data acquisition rates up to 5 kHz maximum
- Each actuator features digital position encoder with sub micron resolution
- Constant speed, constant load rate, position and load control
Options
- Actuator stroke 150 mm (6 in)
- Strain measurement and control
- Choice of load cells – selected to match sample and application requirements
- Integrated standalone video extensometer with DIC technology
- Accessories to match application - grips, fixtures, chambers
Specification
Applications
- High strength materials such as steel, aluminum, laminated composites, and polymer reinforced composites
- Test types including fatigue, static and fracture crack growth
Accessories
Each system includes sample grips or test fixtures, strain measurement and strain control options, chambers and bathes to produce a controlled test media. We are experts at supplying turnkey systems with integrated fixturing and strain measurement instrumentation.
- Environmental Chambers & Solutions
- Integrated standalone video extensometer with DIC technology
- Grips and Fixtures compatible with environments
Click here to go back to Planar Biaxial Test Machines selectionTestResources’ 574 Series Electrodynamic Planar Biaxial test systems provide researchers new abilities to characterize and evaluate quasi-static, dynamic and fatigue performance of low strength materials under planar biaxial loading conditions. With the 574 system, you can perform virtually any mechanical test used to characterize material properties.
Each of our systems are provided as a complete test solution with test table or benches in capacities ranging from very low force biomedical configurations of 22N full scale to general materials testing applications that require higher force configurations rated up to ± 30 kN (6750 lbf). We will work with you to configure a solution that meets your unique application requirements.
Transducers
Transducers include load and position encoder based measurements with both contacting and non contacting strain based extensometers available. The video extensometer uses digital image correlation (DIC) technology.
Four Channel Test Controller
All system configurations feature high precision load and optional strain control on two synchronized axes which makes it possible to create controlled complex biaxial stress and strain test states. The system is user programmable for static tensile/compression and fatigue tests on flat test samples. Our four channel closed loop servo controller controls all four actuators independently to move in synchronized opposing directions on two axis perpendicular to each other. Independent control allows the ability to keep one or more actuators operating with different parameters for possible unequal states of stress testing methods.
Four Actuators
The actuators and load cells are specifically matched to your load and speed application requirements. Each actuator includes high precision noise free digital position encoders. Our 24 bit controller increases resolution for analog transducers such as LVDT, load cell, and extensometers. Our controllers set a new performance standard for low noise floor, delivering better than 0.02% on raw data; even better than that when used with the unit's digital filters.
Features
- Modular System Design: This system is an expandable solution designed so that you can integrate additional actuators (e.g. torsion) to create new system configurations. You can grow your test solution when needs change or evolve. The system includes four independently controlled actuators that enables you to test your samples in different states of stress or in equibiaxial conditions. The actuators can be user reconfigured and set up as four independent uniaxial test stations. The controls are capable of either mode - single 4 channel controlled planar biaxial or 4 stations of single channel control (e.g. multi-station control).
- Actuator Technology: This actuator is uniquely suited for low to high force applications with high stability and excellent controllable response at test speeds to 15 hz. It is a perfect solution for static and fatigue testing applications. Each actuator will stroke 75 mm (3 in) with options up to 450 mm (18 in). Actuator displacement is measured to 0.1 micron resolution using integrated position encoders.
- FlexibleHigh Resolution Controller: Four channels of independent load, position and strain control make it ideal for static, dynamic and fatigue tests including tension, compression, shear, stress relaxation, and creep. It is ideal for single channel uniaxial tests, multiaxial tests and multi station test setups. Maximum data acquisition rate is 5,000 hz and includes high resolution (24 bit) data acquisition. With this control quality, all 574 models can perform sub gram load controlled tests.
- Test Data Analysis: Data is available in ASCII and CSV file formats for further user analysis in applications like Excel or Matlab. Our design goal is to give you, the test researcher, the freedom to ‘do it your way’ when it matters most.
- Remote Data Monitoring: Use any windows based computer to run your machine. Our controllers use TCP/IP technology to connect to any PC in your lab. We do not customize your PC and this means you can monitor the status of those long term tests from your desktop PC.
Options
- Strain measurement and control
- Choice of load cells – selected to match sample and application requirements
- Integrated standalone video extensometer with DIC technology
Specifications
Applications
- Low Forces - Biomedical (574LE1 and 574LE2)
- Good for micromechanical tests where subgram loads need to be controlled and measured.
- Soft biological fibrous tissues
Example: Planar Biaxial Tester for Biological Soft Tissues
Example: Planar Biaxial Tests of Collagenous Soft Biological Tissues
- Medical components
- Medical devices
- Biomechanical research
- Thin films - Moderate Forces - (574LE3, 574LE4, 574LE5)
- Sheet metal
- Hard foams
- Hyperelastic rubber
- Fibre reinforced polymer composites
- Silicone elastomers
- Flexible materials and rigid substrates
Accessories
Each system includes sample grips or test fixtures, strain measurement and strain control options, chambers and bathes to produce a controlled test media. We are experts at supplying turnkey systems with integrated fixturing and strain measurement instrumentation.
- Biomedical Bathes for soft tissues and biological samples
- Environmental Chambers
- Extensometers
- Grips and Fixtures compatible with environments
Planar Biaxial Test Machine Video
974 Series servohydraulic planar biaxial test system enables static, dynamic, and fatigue tests on high strength square, rectangular and cruciform test samples. 974 systems are used for metal and composite fatigue and fracture and configured for higher forces and test speeds compared to the electrodynamic 574 series. They feature higher force capacities and higher speed capabilities compared to the
Transducers include load and position encoder based measurements with both contacting and non contacting strain based extensometers available. The video extensometer is based on digital image correlation (DIC) technology. The mechanical extensometer is a two channel wheatstone bridge.
This system features high precision load and optional strain control on two synchronized axes which makes it possible to create controlled complex biaxial stress and strain test states. The system is programmed for tensile and tension-tension fatigue tests on flat test samples. Our four channel controller controls all four actuators independently to move in opposite directions on two axis perpendicular to each other.
Each system features four individually controlled servohydraulic actuators programmed to create synchronized yet independent control load and strain. They generate high precision states of stress along two axis (XY plane) in a biaxial mode. Tension, compression, and shear tests can be performed at a constant speed, constant load rate static tests, high speed, and high frequency load controlled fatigue tests. The actuator force rating, test stroke and operating frequencies are made to order and designed to match application requirements.
Features
- Test Space designed for customer samples and applications
- Four channels of independent load, position and strain control
- Actuator strokes to 100 mm (4 in)
- 5,000 Hz data acquisition rate
- Wide range of compatible optional accessories including tensile grips, compression and bend fixtures, environmental chambers, extensometers, etc.
- 12 month warranty and customer support services
Options
- Actuator stroke made to application requirements
- Strain measurement and control
- Integrated standalone video extensometer with DIC technology
- Accessories to match application - grips, fixtures, chambers
Specifications
Applications
High strength materials such as steel, aluminum, laminated composites, polymer reinforced composites, concrete and concrete reinforcements. Test types including fatigue, static and fracture tests such as fatigue crack growth.
Accessories
Each system includes sample grips or test fixtures, strain measurement and strain control options, chambers and bathes to produce a controlled test media. We are experts at supplying turnkey systems with integrated fixturing and strain measurement instrumentation.
- Biomedical Bathes for soft tissues and biological samples
- Environmental Chambers
- Extensometers
- Grips and Fixtures compatible with environments
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