MTS Systems Logo Contact Us
  • Industries
    • Automotive
      • Passenger Cars & Light Trucks
      • Driver Assisted & Autonomous Vehicles
      • Electric & New Energy Vehicles
      • Heavy Trucks & Commercial Vehicles
      • Off-Highway Vehicles (OHV)
      • Racing & Motorsports
      • Recreational Vehicles
      • Motorcycles
      Automotive

      Automotive

      320 kph

      flat-belt roadway enables precise replication of motorsports cornering maneuvers

      Read the Case Study
    • Materials
      • Metals
      • Composites
      • Plastics
      • Rubber & Elastomers
      • Adhesives
      • Concrete & Rock
      • Ceramics & Glass
      • Textiles
      • Wood
      • Paper Products
      • Universities
      Materials

      Materials

      1500 degree Celsius

      solutions for testing high-temperature alloys, composites, ceramics and polymers

      Read the Article
    • Aerospace
      • Fixed Wing Aircraft
      • Helicopters & Rotary Wing Aircraft
      • UAM (Urban Air Mobility)
      • Delivery Drones
      • Supersonic Aircraft
      • Space Structures
      Aerospace

      Aerospace

      20% increase

      in testing speeds using state-of-the-art cross-coupling compensation technology

      Read the Article
    • Biomedical
      • Orthopedic
      • Medical Devices
      • Dental
      • Hospitals & Universities
      Biomedical

      Biomedical

      1 in 1,000 children

      will need corrective scoliosis surgery

      Read the Case Study
    • Civil Engineering
      • Multi-Hazard Engineering
      • Seismic Engineering
      • Structural Engineering
      Civil Engineering

      Civil Engineering

      1.32 million pound

      force capacity enables the testing of very large specimens all the way to failure

      Read the Case Study
    • Rock Geomechanics
      • Fossil Fuels
      • Geothermal Energy
      • Mining
      • Construction
      • Carbon Sequestration
      • Research
      Rock Geomechanics

      Rock & Geomechanics

      3x stronger

      concrete materials make it possible to carry higher loads

      Read the Case Study
    • Energy
      • Wind Energy
      • Oil & Gas
      Energy

      Energy

      56 MNm

      overturning moment capacity enables testing of the largest wind turbine drivetrains

      Read the Article
    • Rail
      • Commuter Trains
      • Freight Trains
      • High-Speed Trains
      Rail

      Rail

      550 kph

      test system enables lab-based studies of high-speed rail operating environments

      Read the Article
  • Applications
    • Materials Applications
    • Test Type
      • Tension
      • Compression
      • Fatigue & Fracture
      • Flexure & Bend
      • Shear, Peel & Tear
      • Torsion
      • Non-Contacting Strain Measurement
      • High Temperature
      • Bi-Axial & Multi-Axial
      • High Rate
      • Dynamic Mechanical Analysis

      Material Applications by Material

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Test Standard
      • ASTM Test Standards
      • ISO Test Standards
      • EN Test Standards

      Material Applications by Material

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Materials
      • Metals
      • Composites
      • Plastics
      • Rubber & Elastomers
      • Adhesives
      • Fasteners & Welds
      • Concrete & Rock
      • Ceramics & Glass
      • Wood & Paper Products
      • Additive Manufacturing

      Material Applications by Material

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Automotive Applications
      • Full Vehicle
      • Axle & Suspension
      • Steering System
      • Drivetrain
      • Dampers
      • Elastomeric Mounts & Bushings
      • Tires
      • Exhaust System
      • Body Mounted Components
      • Cooling System Components
      • Transportation & Packaging
      • Motorcycle
      • Farm, Construction, Off-Highway Vehicles (OHV)

      Automotive

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Aerospace Applications
      • Complete Full-Scale Structures
      • Sub-Assemblies
      • Sub-Systems
      • Flight Control Systems
      • Airframe Components
      • Rotary-Wing Components
      • Gas Turbine Component Fatigue

      Aerospace

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Biomedical Applications
      • Orthopedic
      • Biomechanic
      • Medical Device
      • Biomaterial

      Biomedical

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Civil Engineering Applications
      • Civil Structures
      • Structural Sub-Assemblies & Components
      • Non-Structural Systems
      • Oil Rig Stay Cables
      • Construction Materials

      Civil Engineering

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Energy Applications
      • Wind Turbine Testing
      • Oil & Gas Pipeline

      Energy

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Rock Geomechanics Applications
      • Fossil Fuels
      • Geothermal
      • Nuclear Waste Storage

      Rock Geomechanics

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Rail Applications
      • Rail Car Suspension Components
      • Rail Car Coupler
      • Rail Car Wheels & Rail
      • Rail Car Axles
      • Rail Car Bogies
      • Complete Rail Cars
      • Rail Car Pantographs
      • Railway Track & Road Bed
      • Catenary & Trolley Wire

      Rail

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

  • Products
    • Automotive Systems
      • Full Vehicle Test Systems
      • Subsystem & Component Test Systems
      • Tire Test Systems
      • Damper Test Systems
      • Elastomer Test Systems
      • Hybrid Simulation Solutions
      • Modular Components

      Automotive

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Materials Test Systems
      • Static Materials Test Systems
      • Dynamic Materials Test Systems
      • Extensometers
      • Grips
      • Fixtures & Platens
      • Furnaces, Chambers & Fluid Baths
      • High Temp Subsystems & TMF
      • Load Cells / Force Transducers

      Materials

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Aerospace Systems
      • Turnkey Control & Data Acquisition
      • Turnkey Hydromechanical Power Distribution
      • Test Article Safety Solutions
      • Series 261 Structural Pressure Test Controller
      • High Force Test Systems
      • Modular Components
      • FlexDAC Data Acquisition Systems

      Aerospace

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Biomedical Systems
      • Orthopedic Test Systems
      • Biomechanic Test Systems
      • Medical Device Test Systems
      • Biomaterial Test Systems

      Biomedical

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Civil Engineering Systems
      • Seismic Simulators & Shake Tables
      • Multi-Axial Subassemblage Structural Test Systems
      • Hybrid Simulation Solutions
      • Seismic Isolation Bearing Test Systems
      • High-Force Test Systems
      • Modular Components
      • STEX Pro Software

      Civil Engineering

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Energy Systems
      • Wind Turbine Blade Fatigue Test Systems
      • Wind Turbine Blade Static Test Systems
      • Wind Turbine Blade Rain Erosion Test System
      • Wind Turbine Bearing & Drivetrain Test Systems
      • Oil & Gas Pipe / Coupling Test Systems
      • High-Force Test Systems
      • Modular Components

      Energy

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Rock & Geomechanics Systems
      • Rock Mechanics Test Systems
      • Polyaxial Rock Test System

      Rock Geomechanics

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Rail Systems
      • Air Spring Test System
      • Railway Damper Test System
      • Rolling Contact Fatigue (RCF) System
      • 4-28 Channel Bogie Frame Test System
      • Bogie Vibration & Characterization System
      • Pantograph Wear & Performance System
      • High-Force Test Systems
      • Damper Durability Test Systems
      • Elastomer Test Systems
      • Modular Components

      Rail

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Test System Components
      • Actuators & Servo-Valves
      • SilentFlo™ Hydraulic Power Units
      • 295 Hydraulic Service Manifolds
      • Stands & Frames
      • Load Bearing Components
      • FlexTest® Controllers
      • FlexDAC Data Acquisition
      • SWIFT® Evo Wheel Force Transducers

      Test System Components

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

    • Software & Monitoring
      • RPC® Connect Software
      • TestSuite™ Software
      • AeroPro™ Software
      • STEX™ Pro Software
      • Elastomer Testing Software
      • Damper Testing Software
      • MultiPurpose TestWare® (MPT)
      • First Road Interact Software
      • Multi-Pump Control Manager
      • Equipment Monitoring

      Software & Monitoring

      Solution Finder

      Search by Test Material, Test Type, or Test Standard to find relevant products fast.

  • Services
    • Services
      • Calibrations & Metrology
      • Consulting & Engineering Services
      • Equipment Monitoring
      • Routine Maintenance & Fluid Care
      • Repairs & Remanufacture
      • Relocation Services

      Services & Support

    • Plans
      • Software Support Plans
      • Technical Support Plans
      • Service Plans
      • Extended Warranty

      Services & Support

    • Training

      Training Courses

    • Parts

      Parts

    • Support

      myMTS Portal

  • Company
    • Our Company
      • About MTS
      • Global Presence
      • History

      Our Company

    • Careers

      Careers

    • Sustainability

      Sustainability

    • Suppliers
      • Supplier Home
      • Products & Services

      Suppliers

  • Solution Finder
  • Contact Us
  • R&D Test Systems
  • E2M Technologies
  • myMTS Portal
  • Global Sites
  • Search
Home > Individual Device Fracture in Multi-Sample Tests

Advanced Test Control Techniques for Improved Insight into Individual Device Fracture in a Multi-Sample Fatigue Test System

By Kelsey Banas, Thomas Byron, Andrew Simon, Scott Anderson, Lito Mejia
multi sample fatigue
Multi-Sample Fatigue Fixture

INTRODUCTION

A multi-sample test system has been created with advanced control techniques, which allow the user to individually monitor the fracture of nitinol single apex samples cut from an endovascular device. The system can reliably detect a reduction in load of less than one gram at test frequency indicating impending failure on each station and increases the rate of data acquisition on the specified station where the load falloff precursors are detected. The software used allows the operator to record peak-valley load data as needed for long term fatigue but also has the ability to capture a user defined number of cycles of that load cell only when a load drop-off occurs without the burden of recording the data from all of the load cells in the test. Only the test site of interest is magnified and detailed. Following a fracture, the system allows the user to decide if the test should continue, pause in order to remove the damaged specimen, or terminate, without damaging any of the other samples. 

EXPERIMENTAL RESULTS

The advanced control techniques used for the multi-sample test system were verified by cycling nitinol single apex samples cut from an endovascular device until failure. The load measurement system is compensated and sufficiently sensitive to detect the load fall off on a single sample prior to fracture. Eight specimens were installed in the system and were individually adjusted to have zero preload applied. The system cycled the specimens at 3 mm displacement for 40 Hz until a specimen fracture was detected. The software procedure initiated data acquisition upon detecting that the peak and valley load readings had fallen into the predetermined region, as shown by the red dashed line in Fig 1 below. The fracture detection program began with a higher data acquisition rate once the load readings decreased by 90%, as shown by the blue dashed line in Fig.1.

NiTi graph

Figure 1: Break Detection of NiTi Specimen

After the fracture was detected, the program controlled the system to stop within 0.1 s without causing further damage to any of the remaining specimens, as shown in Fig. 2 below. This procedure can be modified to pause the test for specimen inspection or removal instead of ending the test for all specimens. When a pause function is used, the lifecycle testing can continue for the remaining, non-damaged specimens without losing cycle count or data.

controlled stop graphFigure 2: System Controlled Stop after Fracture Detection

 

DISCUSSION

The multi-sample test system detects and monitors individual nitinol specimen damage during lifecycle testing using the procedure described in the figure below. Peak or valley load reductions of less than 1 gram can be reliably measured at frequency. The software may then stop the system for examination, or continue and remove the failed loading site from the data stream. It is our observation that this capability is unique.

 

load graph

Figure 3: System Response Discussion

 

CONCLUSIONS

The advanced control techniques used on the multi-sample test system provide the ability to individually monitor and record fractures of nitinol apices. The pause and stop test functions are controlled with advanced techniques which ensure no further damage will be done to any of the installed samples. These software capabilities also allow for high reliability in the event of power loss or unforeseen interference. Additional operator specified data acquisition methods and analysis are available within the control system to meet specific test needs. The ability to individually detect the load falloff of nitinol apices allows for advanced insight in device fractures during testing.

 

 

MTS Acumen with MSF-15

Learn more about using MTS Acumen for biomedical testing.

Product Details
Kelsey Banas, Thomas Byron, Andrew Simon, Scott Anderson, Lito Mejia
MTS Systems, Eden Prairie, MN, USA
Also of Interest:
  • Static Materials Test Systems >
  • Wind Turbine Test Applications >
  • Materials Tensile Test Applications >
Stay Connected
  • INDUSTRIES
  • Automotive
  • Materials
  • Aerospace
  • Biomedical
  • Civil Engineering
  • Rock Geomechanics
  • Energy
  • Rail
  • SALES & SUPPORT
  • Sales Offices
  • Services
  • Training
  • Parts
  • Customer Portal
  • SUPPLIERS
  • Terms & Conditions
  • Products & Services
  • Expectations
  • Workmanship Standards
  • Packaging & Labeling
  • Routing Guide
  • COMPANY
  • About
  • News
  • Careers
  • Culture
  • Sustainability
  • History
  • SOLUTIONS
  • Applications
  • Test Standards
  • Products
  • RESOURCES
  • Learning Center
  • Solution Finder
  • Quality
  • Product Safety
  • Patents
  • CONTACT US
  • SUPPORT: 952-937-4000
  • Online Request
  • Request A Quote
  • Sales Offices
  • BUSINESSES
  • MTS Systems
  • E2M Technologies
  • R&D Test Systems
  • MTS SANS China
    • © MTS Systems. All Rights Reserved
    • 952.937.4000
    • Privacy Policy
    • Terms Of Use
    • Terms & Conditions
    • Sales Offices
    • Cookie Preferences
We use necessary cookies to make our site work. We'd also like to set up optional analytics cookies to help us improve it. We won't set optional cookies unless you enable them.
Decline Accept
We use necessary cookies to make our site work. We'd also like to set up optional analytics cookies to help us improve it. We won't set optional cookies unless you enable them.
Decline Accept