Fatigue Tests

JFE-TEC - A company with an established reputation in evaluation and analysis of metal fatigue!

Most mechanical failure of metals is fatigue failure. Making full use of fatigue test know-how cultivated through work with iron and steel and approximately 25 fatigue testing machines of various types, our staff can provide valuable assistance in the client's evaluations of fatigue strength. Because we have a wealth of know-how in jig design, which is the highest hurdle in testing techniques, first ask us! We can also respond to clients' requests by utilizing our abundant experience in analysis of test results and fracture surface analysis techniques.

We can also provide fatigue testing services for FRP, ceramics and other non-metallic materials.

Please take a look at our fatigue tests of implant materials, which are used in the medical field!

Types of Fatigue Tests

Fatigue tests include the following types, which are classified by the form of the applied load, environmental factors, etc.

  • Tension-compression fatigue tests

    Evaluation of endurance (fatigue strength) against cyclic stress by using a combination of tension, unloading and compression.

    • High cycle fatigue test: Normal fatigue test at frequencies up to approximately 1-5000 Hz.
    • Low cycle fatigue test : Fatigue test using a slow strain rate at frequencies of less than about 10 Hz.
    • Gigacycle fatigue test : Fatigue test in which approximately 1 × 109 cycles or more are applied in a short time by ultrasonic vibration, etc. (JFE-TEC does not perform this type of fatigue test.)
  • Fatigue crack propagation testing machine

    Evaluates the propagation rate of fracture crack under cyclic stress.

  • Plane bending fatigue testing machine
  • Torsional fatigue testing machine
  • Rotating bending fatigue testing machine
  • Simulated environment fatigue testing machine

    Possible to perform fatigue tests in actual use environment, for example, in seawater.

    • Corrosion fatigue testing machine
  • Part fatigue testing machine

    Possible to perform fatigue tests of parts in the part condition.

    • Part fatigue testing machine
    • Triaxial fatigue testing machine
  • Structural member fatigue testing machine

    Possible to perform fatigue tests in actual structures

JFE-TEC's Lineup of Fatigue Testing Machines

Tension-Compression Fatigue Testing Machines
Machine name Location Number Capacity/specification, etc. Features of machine
Examples of tests
Max. load Max. stroke Max. frequency
5kN testing machine Keihin 2 ±5kN ±50mm 20Hz
  • Possible to test ultra-thin materials with sheet thickness of 0.2-1 mm.
20kN testing machine Keihin 3 ±20kN ±25mm
or
±50mm
20Hz
  • Strain-controlled low cycle testing machine (No. 4)
  • Possible to perform high temperature tests up to max. 200℃.
50kN testing machine Keihin 2 ±50kN ±25mm 20Hz
  • Fatigue crack propagation test
200kN testing machine Keihin 3 ±200kN ±25mm
or
±50mm
20Hz
  • Supports testing of long members (up to 750 mm).
500kN testing machine Keihin 3 ±500kN ±50mm
or
±100mm
15 - 20Hz
  • Weld fatigue test
  • 3-point bending fatigue test
  • Supports testing of long members (1450 mm).
1000kN testing machine Keihin 1 ±950kN ±120mm 15Hz
  • Actual member tests of large-scale automotive parts, etc.
1500kN testing machine Keihin 1 ±1500kN ±50mm
or
±100mm
10Hz
  • Large capacity testing machine (rare in Japan)
10kN testing machine Chiba 1 ±10kN   10Hz  
100kN testing machine Chiba 1 ±100kN   30Hz  
1000 kN  fatigue testing machine equipped with large bed1000kN fatigue testing machine equipped with large bed Crack  growth measuring deviceCrack growth measuring device Enlarged  view of crack growth test piece Enlarged view of crack growth test piece
Plane Bending Fatigue Testing Machine
Machine name Location Number Capacity/specification, etc.

Features of machine

Examples of tests
Max. load Max. stroke Max. frequency
Plane bending fatigue testing machine Keihin/Chiba 10 -15 - 30N⋅m -12 - +24deg 25Hz
  • Steel sheets
Plane bending fatigue testing machinePlane bending fatigue testing machine View of a plane bending fatigue testView of a plane bending fatigue test
Torsional Fatigue Testing Machines
Machine name Location Number Capacity/specification, etc. Features of machine
Examples of tests
Max. load Max. stroke Max. frequency
Torsional fatigue testing machine Keihin 1 ±10kN⋅m ±50deg 15Hz
  • Possible to perform large capacity torsional fatigue tests.
Torsional fatigue testing machineTorsional fatigue testing machine
Rotating Bending Fatigue Testing Machines
Machine name Location Number Capacity/specification, etc. Features of machine
Examples of tests
Max. load Max. stroke Max. frequency
Rotating bending fatigue testing machine Keihin 2 100N⋅m - 50Hz
fixed
  • Ono type testing machine
  • Non-proportional test
Part Fatigue Testing Machine
Machine name Location Number Capacity/specification, etc. Features of machine
Examples of tests
Max. load Max. stroke Max. frequency
30kN part fatigue testing machine Keihin 1 ±30kN ±50mm
or
±100mm
10Hz
  • Fatigue tests of automotive suspension parts
  • Portable type
  • Variable loading direction, long stroke
Structural Member Fatigue Testing Machines
Machine name Location Number Capacity/specification, etc.
Dynamic max. load Static max. load Max. stroke Max. frequency Max. test space
1.0MN high speed fatigue testing machine Chiba 1 ±1.0MN ±1.2MN ±100mm 20Hz 5.5mH×3.5mW×20mL
750kN high speed fatigue testing machine Chiba 1 ±750kN ±1MN ±50mm 20Hz 2mH×1.5mW×3mL
500kN actuator Chiba 1 ±500kN - ±100mm 1Hz -
±1 MN high speed fatigue testing machine±1MN high speed fatigue testing machine 750 kN high speed testing machine750kN high speed testing machine 500 kN actuator500kN actuator

JFE-TEC Solution Services Utilizing Fatigue Testing Technologies

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