Bone Plate Four-Point Bending Fatigue Testing Machine
Category：Medical Device Tester
Introduction
The Bone Plate Four-Point Bending Fatigue Testing Machine is a specialized device used to evaluate the fatigue performance and mechanical strength of orthopedic bone plates. It applies cyclic four-point bending loads to simulate physiological conditions, allowing assessment of the plate’s durability, bending strength, and failure characteristics under repeated stress.
Standards
(1)YY/T 1503
(2)ASTM F382
These standards specify the testing methods for the bending fatigue performance of metallic bone plates. They provide evaluation methods for different designs of bone plates. Fatigue tests are conducted under cyclic loading at a frequency of 5 Hz, with R = 0.1. for 1 million cycles or until specimen failure.
The M series electromagnetic testing system provides precise sinusoidal load control and offers comprehensive test fixtures (different sizes, contoured rollers, etc.) to accommodate specimens of various dimensions. The system also provides accurate and effective testing procedures (SOPs) to support mechanical performance analysis of metal bone plates or comparison of different bone plate designs.
Application
The Bone Plate Four-Point Bending Fatigue Testing Machine is designed to evaluate the mechanical durability and structural performance of orthopedic bone plates under repeated bending loads. Typical applications include:
Orthopedic implant testing: Assess bending strength, stiffness, and fatigue life of bone plates.
Quality control: Ensure consistent mechanical performance of bone plates during production.
Research and development: Optimize design, material, and geometry of bone plates for enhanced fatigue resistance.
Standards compliance: Perform tests according to ISO 9585. ASTM F382. and other relevant international guidelines.
This machine helps verify that bone plates can withstand cyclic bending stresses encountered in clinical use.
Specifications
| Parameter | Value |
|---|---|
| Maximum Load Peak | 1100 N |
| Dynamic Load Peak | 1000 N |
| Static Load Peak | 700 N |
| Testing Machine Grade | 0.5 |
| Load Measurement Range | 0.4% – 100% F.S. |
| Load Measurement Accuracy | ±0.2% of indicated value (within measurement range) |
| Maximum Fatigue Loading Frequency | 100 Hz |
| Axial Stroke | 30 mm |
| Displacement Resolution | 0.1 μm |
| Test Space (Upper-Lower Fixture Gap) | 0–950 mm |
| Net Weight | Approx. 900 kg |
| Dimensions | Approx. 1000 × 700 × 1800 mm |
| Optional Environmental Accessories | Water bath, high temperature, low temperature, humidity environment, etc. |
| Applications | Fatigue/fracture/static testing of metals, polymers, composites; static/dynamic testing of surgical implants (trauma, joint, spine, dental), polymer tensile fatigue testing, rubber crack propagation testing, etc. |
| Optional Fixtures | Mechanical tensile clamps, compression clamps, bending clamps, femoral stem fixtures, four-point bending fixtures, spinal rod/screw fixtures, tibial plateau fixtures, vertebral resection model compression/tensile fixtures, dental implant fixtures, etc. |
Features
Next-generation fatigue testing system driven by a large electromagnetic motor.
Direct-drive electromagnetic motor ensures stable operation, high repeatability, and precise control of force and displacement.
Built-in electromagnetic actuator with low friction and high repeatability; high system responsiveness and speed.
Capable of performing tensile, compressive, bending, shear, creep, and relaxation tests.
Meets modern material testing requirements for high precision, high frequency, stability, durability, and reliability.
Oil-free, seal-free, maintenance-free, long life, highly integrated, easy installation, and compact footprint.
Wide selection of clamps and accessories available.
Accessories
(1)Specimen Fixtures: Adjustable supports for securing bone plates in a four-point bending setup.
(2)Load Frame and Actuator: Delivers controlled cyclic bending loads to the test sample.
(3)Data Acquisition System: Records forces, displacement, and fatigue cycles.
(4)Calibration Tools: Ensure accuracy of sensors and force measurement.
Maintenance Information
Daily Cleaning: Wipe fixtures, load frames, and sensors to remove debris or residues.
Calibration: Regularly calibrate force and displacement sensors for accurate readings.
Inspection: Check for wear, loose parts, or mechanical damage.
Lubrication & Storage: Lubricate moving parts if required and store the machine in a dry, clean environment.
FAQ
1. What is the main purpose of this machine?
It tests the bending strength, stiffness, and fatigue life of bone plates under repeated four-point bending loads.
2. Which types of bone plates can be tested?
Cortical plates, locking plates, reconstruction plates, and other orthopedic bone plates.
3. How are the tests conducted?
Bone plates are mounted on a four-point bending fixture, and cyclic loads are applied while measuring displacement, force, and fatigue cycles.
4. Which standards does it comply with?
Supports ISO 9585. ASTM F382. and other international standards for fatigue testing of bone plates.
5. How is maintenance performed?
Regular cleaning of fixtures and sensors, calibration of force and displacement measurement, inspection of mechanical parts, and proper storage in a dry environment.
If you're ready to take the next step, Leave your message below and we’ll reply soon. 20+ years of manufacturing & export experience, a partner you can trust.
