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Produits » Machines d'essai » Machines de Fatigue » Fatigue Thermomécanique et oligocyclique » Low Cycle Fatigue

Low Cycle Fatigue (LCF)

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LCF 8862 system
LCF loadstring
LCF extensometer
  • LCF 8862 system
  • LCF loadstring
  • LCF extensometer
  • Description
  • Literature
  • Applications

Low Cycle Fatigue (LCF) testing is a growing area of materials testing, driven in particular by increasing demand from the aerospace, automotive and power generation industries. ISO 12016 and ASTM E606 specify the standard practice for strain controlled fatigue testing, used for simulating mechanical loading into the plastic region. This testing is typically carried out at very high temperatures to replicate the service conditions experienced by turbine blades in both gas turbines and jet engines.

Whilst the load string and heating technology are a crucial part of any LCF testing system, Instron also has two fundamentally different actuator technologies for you to consider. Most fatigue testing systems are hydraulically powered and deliver the high dynamic performance required to reduce the time taken to complete lengthy high cycle fatigue tests. In the case of LCF, testing is typically run at very slow speeds and precision strain control is more important that running at high frequencies. As well as offering a traditional hydraulic technology for LCF, Instron offers a unique servo-electric actuator which is ideally suited to the challenges of LCF. Choosing Instron’s servo-electric technology will reduce the infrastructure requirements of your new machine and minimize your running costs. Whichever solution is best suited to your needs, Instron will supply a load frame with high lateral and axial stiffness and a precision alignment fixture to meet the demands of your LCF testing.

Instron acknowledge that the demands of LCF testing are very different to that of a ‘general purpose’ test machine and we design our software tools accordingly. Specialist LCF3 software makes it easy to carry out complex tests and get the results you need first time, every time; with automated calculations, real time data views and powerful post-processing built in.

Features

  • High capacity loading frame maximizes lateral and axial stiffness during reverse stress testing.
  • Optional backlash free, all-electric actuator delivers precise slow speed control with virtually silent operation and no hydraulic infrastructure requirements.
  • AlignPRO alignment fixture and supporting software are provided as standard to ensure precision loadstring alignment.
  • Three zone furnace with cascade control of specimen temperature with optimized temperature gradient.
  • Dedicated LCF3 software suite provides streamlined test setup and analysis of hysteresis loops, plastic strain measurement and common LCF calculations.
  • All Instron LCF systems are fully integrated and are supplied ready to test, meeting all appropriate international standards.

 

To find out more about Instron LCF systems, please click on the ‘Contact Us’ tab above and send us a message with your questions or requirements.

 

LCF Brochure

Low Cycle Fatigue (LCF) testing is a growing area of materials testing, driven in particular by increasing demand from the aerospace, automotive and power generation industries. ISO 12016 and ASTM E606 specify the standard practice for strain controlled fatigue testing, used for simulating mechanical loading into the plastic region. This testing is typically carried out at very high temperatures to replicate the service conditions experienced by turbine blades in both gas turbines and jet engines.

  • Produits
  • 2/20/2019
  • 2.4 MB

8862 Servo-Electric Testing System

8862 systems have been the industry choice for Low Cycle Fatigue (LCF) testing for decades and are now fully integrated with our latest controller platform. Instron® has developed this system specifically to address the challenges of reverse-stress Low Cycle Fatigue and Thermomechanical Fatigue (TMF) testing. The unique actuator technology utilizes an all-electric, backlash free, ball-screw drive eliminating the need for hydraulic infrastructure to support the machine.

  • Produits
  • 2/15/2019
  • 287.3 KB

High Temperature Water Cooled Hydraulic Reverse-Stress Pullrods - 3117-501

The 3117-501 pullrods reverse-stress pullrods with hydraulic preload designed for elevated temperature Low Cycle Fatigue applications. The pullrods are also suitable for hot tensile tests and other reverse axial stress applications.

  • Applications
  • 1/16/2019
  • 1.0 MB

Furnace Controller & Software | 3117-301/302

Instron's revolutionary approach to furnace control solves one of the challenges of high temperature which is rarely discussed. Temperature control is notoriously challenging and dependent on expert technician's knowledge to configure, tune and optimise multiple temperature controllers to achieve the desired heating rate, set point and temperature gradients.

  • Applications
  • 1/16/2019
  • 0.8 MB

Electrically Operated Pump with One-Touch Operation | 3117-503

An alternative to traditional manual pressurisation of hydraulic pull rods this integrated electronic solution offers superior repeatability between users and between tests. This unit offers significant ease of use advantages over a manual solution and provides consistent and repeatable clamping and pressurisation.

  • Applications
  • 1/16/2019
  • 0.8 MB

Dynacell

The 2527 Series load cells are designed for use with Dynamic Testing Systems; offering exceptional performance with the ability to measure forces as low as 1/250th of the force capacity to an accuracy of 0.5% of reading. Automatic transducer recognition and electrical calibration, makes them easy to use. The load cells can withstand loads up to 150% of their force capacity without damage and 300% without mechanical failure. All Instron load cells are individually temperature-compensated and tested for accuracy and repeatability on calibration apparatus that is traceable to international standards, with a measurement uncertainty that does not exceed one-third of the permissible error of the load cell.

  • Produits
  • 8/17/2018
  • 0.6 MB

AlignPRO™ Alignment System

Compliant with ASTM E 1012 standards, the New AlignPRO™ system is designed to assist you in the measurement, adjustment and verification of load string alignment.

  • Produits
  • 8/9/2013
  • 0.8 MB

Essais de Fatigue Oligocyclique LCF selon ISO 12106 et ASTM E606

Instron propose des systèmes intégrés et des logiciels parfaitement adaptés aux essais de fatigue oligocyclique LCF répondant aux normes internationales ISO 12106 et E606

Fatigue Thermomécanique (TMF) selon ISO 12111 et ASTM E2368

Les systèmes d'essais de fatigue thermomécanique (TMF) d'Instron permettent de réaliser facilement les essais conformes aux normes ISO 12111 et ASTM E2368.

Electro-Thermal Mechanical Testing

The Instron ETMT system can measure a range of physical and mechanical properties, including tensile, compression, creep, low cycle fatigue (LCF) and thermomechanical fatigue (TMF) properties of materials. In addition, it has determined resistivity, thermal expansion coefficients and phase transformations in a variety of materials including steels, titanium alloys and intermetallic alloys.

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