Information on the most widely used ASTM standards within the materials testing industry
Model: UTDST, dual axis test
UnitedTest UTDST series Multi‐Axis Fatigue Torsional & Bending testing system understake this task, used to check the torsion and bending, tension test for the Intramedullary lengthening nail/Intramedullary leg lengthening implants nails.
Fatigue in intramedullary implants causes severe complications due to the failure of implants and related operation during the consolidation phase. This work succeeds in developing a test fixture and procedure for inducing three‐dimensional loading in order to define the fatigue life of an implant. The fatigue can be analyzed for various osteotomy locations and for various load spectra based on the estimates made for a patient or patient group. The fixture induces reliable loadings at cycle rates up to 2 Hz.
General Introduction
UnitedTest UTDST series Multi‐Axis Fatigue Torsional & Bending testing system understake this task, used to check the torsion and bending, tension test for the Intramedullary lengthening nail/Intramedullary leg lengthening implants nails.
Fatigue in intramedullary implants causes severe complications due to the failure of implants and related operation during the consolidation phase. This work succeeds in developing a test fixture and procedure for inducing three‐dimensional loading in order to define the fatigue life of an implant. The fatigue can be analyzed for various osteotomy locations and for various load spectra based on the estimates made for a patient or patient group. The fixture induces reliable loadings at cycle rates up to 2 Hz.
Currently, the ASTM F1264 standard provides the test methods for studying the mechanical performance of intramedullary fixation devices and defines the test procedure for four‐point bending tests. The existing test methods are suited for studying torsional and relative bending performance separately in a single load mode at a time. The four‐point bending test fixture induces localized surface loads and results in an unrepresentative loading‐deformation especially in an implant that is hollow.
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| Bottom bending fixture ratation in 45o, meantime vertical compression loading | |
Key Features
1), Servo liner actuator is the key part in this testing machine, the test output load through this actuator; with United Test technology self design, the actuator internally intall on the top side of frame, consist of actuator, servo motor, servo driving sytem, and load cell.
2), Servo liner actuator frequency limitation position have relief area, avoid the damage of out control.
3), Liner sensor with USA Schaevitz company LVDT, move smoothly, piston rod made by extra-fine process, surface chrome-plated polishing to Rα0.4u.
4), Between load cell and clamper connection, push-pull rod and clamper position have specialized gap elimination device, then improve the dynamic response ability.
ISO 7206-4: Implants for surgery -- Partial and total hip joint prostheses -- Part 4: Determination of endurance properties of stemmed femoral components.
ISO 7206-6: Implants for surgery -- Partial and total hip joint prostheses -- Part 6: Determination of endurance properties of head and neck region of stemmed femoral components.
ISO 7206-8: Implants for surgery -- Partial and total hip joint prostheses -- Part 8: Endurance performance of stemmed femoral components with application of torsion.
ASTM F2580: Standard test method for evaluation of modular connection of proximally fixed femoral hip prosthesis.
A new generation fatigue testing system with a large electromagnetic motor as the actuation core;
The direct drive electromagnetic motor operates stably with high repeatability, ensuring precise control of force and displacement;
The built-in electromagnetic actuator has the characteristics of low friction, high repeatability, high system response, and high speed;
Can perform tests such as tensile, compressive, bending, shear, creep, relaxation, etc;
Meet the strict requirements of modern material mechanics testing for high precision, high frequency, high stability, and durability;
It has the characteristics of oil-free, sealless, maintenance free, long service life, high integration, easy installation, and small footprint;
Various fixtures and accessories are available for selection.
1. Environmental Friendliness
No hydraulic oil leakage or pollution
Low noise operation (≤70dB) allows placement in office areas
Energy-efficient (only consumes power during testing)
2. Cost Benefits
Initial investment: Lower than hydraulic systems
Maintenance: No hydraulic fluids, filters, or seals to replace
Running costs: Minimal power consumption
Space savings: Small footprint reduces laboratory space requirements
3. Performance Advantages
Precision: Backlash-free motion with high repeatability
Control flexibility: Smooth transition between load, displacement, and strain control
Safety: Dual-stage drive mechanisms and overload protection
Clean operation: Ideal for testing sensitive materials like medical devices
4. Ease of Use
Ergonomic design: Intuitive touchscreen or PC interface
Quick setup: Easy specimen installation with specialized fixtures
Automation: Programmable test sequences and data logging
Real-time monitoring: Simultaneous capture of force, displacement, strain, and cycle count (up to 10^9 cycles for long-term fatigue testing).
Biomechanical metrics: Automated calculation of fatigue life (S-N curves), modulus degradation, creep-fatigue interaction, and failure mode (brittle vs. ductile).
Compliance with biological testing standards: Pre-programmed test protocols for ISO, ASTM, and FDA guidelines for biomaterials.
Data export: Compatibility with bioinformatics tools (e.g., MATLAB, Python) for post-test analysis of tissue/biomaterial degradation.
Main Technical Specification
| Max. dynamic load | ±10KN Accuracy ±1% |
| Max. static load | ±10kN |
| Torque measuring range | 1Nm~50Nm |
| Torque resolution | 0.01o |
| Rotate range | ±45o (0.1HZ) |
| Torsion frequency | ±10o, 5HZ |
| Dynamic fluctuation | Less than ±1%FS |
| Actuator max. stroke | ±30mm, accuracy ±0.5%FS |
| Amplitude at Max. frequency | ±1mm |
| Max. Frequency | 0.1HZ~15Hz |
| Max. line velocity | 150mm/s |
| Control mode | Load, displacement, deformation |
| Main test waveform | Sinusoidal wave, triangular wave, square wave, sawtooth wave etc., |
| Pass through Zero | Complete display the pass through zero hysteresis loop curve. |
| Columns number | 2 |
| Vertical space | 750mm |
| Max. test space | 450mm (include test fixture) |
| Test width | 450mm |
| Cooling method | Water cooling |
| Weight | 350kg |
| Dimensions | 785*620*1650mm |
| Standard Power | 380/220V, 50/60HZ, 3 phase, 4Kw |
| Working system | MS Win10 / Win11 |
Main Accessories
| High Stiffness Frame | 1 set |
| Servo liner actuator | 1 set |
| Servo motor/driver (Japan Panasonic) | 1 set |
| Loadcel: (USA Vishay Celtron) | 1 set |
| LVDT (Japan Tamagawa liner displacement sensor) | 1 set |
| Tensile test fixture (optional according requirement) | |
| Compression platen (100mm) | 1 set |
| Fully digital servo controller | 1 set |
| Professional testing software | 1 set |
| Computer | 1 set |
| Printer | 1 set |
| Documents (Manual, packing list, certificate) | |
Main Structure

UTDS series Electronic Dynamic Universal Testing Machine mainly consist of parts as below:
1, movable loading platform, can 360 degree free adjusting, easy for sample test.
2, Imported actuator, Japan Panasonic driving system.
3, Data collection system, English software, static/dynamic controller.
4, USA Vishay celtron load cell.
6.1 Servo actuator
Actuator mounted on the top pf working table.
● Max. load capacity: 10000N.
● Effective stroke: +/-50mm (total 100mm)
● Actuator include Japan Tamagawa high accuracy displacement sensor.
● Actuator amplitude limitation position designed with buffer zone, avoid the damage caused by out of control.
● Include device to eliminate the gap clearance, minimize the side force, reduce the impact during high frequency test.

6.2, Load cell
● Use the USA Vishay Celtron load cell, 10KN, overload capacity 150%, mounted at front end of actuator piston, with self-lock nut.
● Calibrated before delivery.
6.3, Data collection system and controller
Servo control system include fully digitally servo controller, computer, software etc.,
1)Controller main consist of:
● Controller frame SUPERTEST T8.3, max. upgrade to 6 channel.
● With two sensor signal unit (load, displacement)
● Signal generator unit
● Computer
2)Controller frame SUPERTEST T8.3 specification:
● Control unit: fully digital PIDF control.
● Frequency range: 0.01 ~15HZ, resolution: 0.01Hz
● Control waveform: Sine wave, Triangle wave, square wave, oblique wave, half of wave etc.,
● Control mode: Load, displacement close-loop control.
● System with load cell calibration, zeroing etc., function.
3)Main function of controller:
● Controller with various corresponding software suite, can meet kinds of different test requirement.
● With calibration system to help customer to calibrate the machine easily.
With multi-control mode, can realize smooth swift, with automatically zeroing, save and recover PID setting, automatically data collection, sample protection function etc.,
Software
Main interface:



Standard
ISO 14879 - 1 is a core international standard formulated by the International Organization for Standardization (ISO) for the mechanical performance evaluation of metallic tibial trays in total knee replacements (TKR). The standard covers two major types of tests: static mechanical testing (to evaluate the ultimate load - bearing capacity and stiffness of the tibial tray) and cyclic fatigue testing (to simulate long - term physiological loading and assess durability).
ASTM F1800 Cyclic Fatigue Testing of Metal Tibial Tray Components of Total Knee Joint Replacements, covers a procedure for the fatigue testing of metallic tibial trays used in knee joint replacements using a cyclic, constant-amplitude force. It applies to tibial trays that cover both the medial and lateral plateaus of the tibia. This practice may require modifications to accommodate other tibial tray designs.
ASTM WK51649 Femoral knee component fatigue testing system - Fatigue Testing of Total Knee Femoral Components Under Closing Conditions
ASTM WK51649 is a draft standard (work item) under development by ASTM Committee F04.22 on Arthroplasty . It proposes a test method for evaluating the fatigue resistance of total knee femoral components under closing conditions, similar in scope to ASTM F3210. (ASTM F3210-22e1 Standard Test Method for Fatigue Testing of Total Knee Femoral Components Under Closing Conditions)
ASTM WK51649 Fatigue testing of the metal femoral component of a total knee joint prosthesis is conducted to establish the F-N curve at different load levels and to determine the fatigue limit of the sample under 10 million cycles.
ASTM F2077-22: Standard Test Methods for Intervertebral Body Fusion Devices
ASTM F2077 test method covers the materials and methods for the static and dynamic fatigue testing of intervertebral body fusion devices, spinal implants that are designed to promote arthrodesis at a given spinal motion segment. Intervertebral body fusion cages are among this implant type.
Axial-Compression
Compression-Shear
Torsion Testing
Used to evaluate the durability and deformation performance of knee joint pads under high bending load conditions. It simulates the stress and deformation of the knee joint during daily activities, such as walking, running, and the impact and pressure experienced during sports. During the tests, specific testing equipment and simulated physical movements are used to apply continuous and high-frequency loads to the knee joint, mimicking actual usage scenarios. By assessing the performance variations of knee joint pads under different bending cycles, such as deformation resistance, rebound performance, and durability, it is possible to determine the quality and lifespan of the pads, providing a basis for the design and improvement of knee protection products. This testing method is of great significance for the research and development as well as quality control of knee protection devices and sports goods.
ASTM F2996 Standard Practice for Finite Element Analysis (FEA) of Non-Modular Metallic Orthopaedic Hip Femoral Stems
ASTM F2996 standard establishes requirements and considerations for developing Finite Element models to evaluate static implant stresses and strains of non-modular metallic orthopaedic hip stem designs. It can be used for worst-case assessment within a family of implant sizes to reduce the need for physical testing. The boundary conditions are set-up according to ISO 7206-4.
Compliance with Industry Standards
Compliance with Industry Standards
| Standard | Application |
|---|---|
| ASTM F1813 | Fatigue testing of metallic bone plates/screws |
| ISO 10993-14 | Mechanical testing of degradable biomaterials |
| ASTM D7137 | Flexural fatigue of polymer biomaterials |
| ISO 7206-4 | Fatigue testing of hip joint implants (low-force components) |
| FDA 21 CFR Part 860 | Biomechanical testing of medical devices (tissue-engineered products) |
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