LOW CYCLE FATIGUE Simplicity by Design, Results you can Trust

UNDERSTANDING LOW CYCLE FATIGUE AND STANDARDISATION Strain-controlled Fatigue Testing At Instron, we are committed to providing the most intuitive and user-friendly systems available for materials testing. We believe it is usability that allows all technicians to approach an Instron Test System with confidence and deliver the results they need first time, every time. Low Cycle Fatigue (LCF) testing studies materials and components in which plastic strains are expected to be induced in the materials under real-world loading conditions. When researching the effects of plastic strain, the specific...

785.0 °C 5 0.2 °C 784.8 °C Strain Control Temperature Control Expertise Alignment • Challenging demands of ASTM E1012 and its requirement for less than 5% bending on a specimen. • Achieving proper alignment from test to test, independent of operator and specimen geometry. • Repeatable alignment in tension and the lateral stiffness required to maintain proper alignment during compression. • Real alignment, time after time and not just to meet your auditor's requirements. Challenging strain control targets which need to be met not just throughout the test but within the very first cycle. Maintaining...

CLASS 5 ALIGNMENT TO ASTM E1012 Prevention of buckling under compression Repeatability of results between specimens and operators A threaded specimen is widely considered to be much more challenging to align as it relies on the inherent inaccuracies of a machined thread. Combined with our guided AlignPRO software and hydro-static bearings we can achieve and maintain outstanding alignment even when changing specimens or operators. However, if you have existing specimens or are unable to change your specimen design to a button head design, it is reassuring to know that you can use Instron’s gripping...

ONE TOUCH INTEGRATED DIGITAL GRIP CONTROL Simple And Repeatable Operation Removes Human Error Requirements Reverse-stress testing requires precise specimen clamping with zero backlash in the system. Historically this was achieved with a mechanical gripping solution using a torque wrench. To achieve repeatable Class 5 Alignment to ASTM E1012, hydraulic gripping is required. To minimize the variance introduced by the operator, the way in which torque or pressure is applied to the system must be highly repeatable. One Touch Operator Independent Gripping Mechanical application of clamping force via...

Requirements • Recreate service conditions of high-temperature metals up to 1000°C • Maintain accurate temperate control across specimen gauge length • Avoid overshoots to study preserve critical material properties • Control the specimen temperature directly when possible and the furnace temperature when thermocouples can't be attached to the specimen Challenges • Traditional temperature tuning can take days to perfect with high levels of expertise required and long heating cooling times. • Lack of flexibility offered by hardware-based temperature control limit. • Sacrificial specimens are often...

STRAIN MEASUREMENTAccurate and Repeatable Strain Measurement At Elevated Temperatures Requirements • Class 0.5 Strain Measurement • Temperatures up to 1000°C • Repeatable Positioning • Repeatable Contact Force • Hot-Unloading for Run-Out Tests • No Extensometer 'walk' or slip during test or tuning Challenges • Achieving results without sacrificing or pre-cycling specimens. • Repeatable application of extensometer by all technicians to achieve consistent positioning, alignment/angle and contact force of extensometer. Max Air Supply: 6 bar Recommended Air Supply. 80 - 10QLPM Loading and Unloading...

STRAIN CONTROL Machine Optimization And Control Which Every One Can Understand Patented Stiffness Based Tuning Patented technology now available on Instron hydraulic systems that makes tuning repeatable and effortless even for strain controlled fatigue. Choose any control mode and tune all transducer channels with a single static ramp within the elastic region. LCF Regular Fatigue Force Control Ramp to force targets over as many as 100 cycles Tension-tension is most common Specimen operating in the elastic region To maintain fidelity through any changes to the specimen which occur as the plastic...

REDUCING RELIANCE ON EXPERTS Simplicity By Design To Give You Results That You Can Trust Strain Measurement & Control Temperature Control Over 600 alignment checks on latest grip design to give you confidence in your alignment time after time. Intelligent software furnace controller with no manual tuning required, just input set point and ramp rate. Easy to follow video guide and product features to ensure repeatable specimen insertion. Detailed product design features to support the repeatable specimen loading procedure. Simple control approach with only two simple steps: auto-tuning and adaptive...

SIMPLICITY BY DESIGN, RESULTS YOU CAN TRUST8801 Servohydraulic System • 100 kN Hydraulic Frame with compact footprint • Extensive capability can also be used for High Cycle Fatigue • Hydrostatic bearings provide excellent alignment characteristics • 250 kN Fatigue rated high stiffness frame • Extensive capability can also be used for High Cycle Fatigue • Hydrostatic bearings provide excellent alignment characteristics 8862 Servohydraulic System • Designed specifically for Low Cycle Fatigue testing • Fatigue rated high stiffness frame • Backlash-free electric actuator for through zero testing •...

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