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On the use of actuator compliance and cod compliance for crack length estimation during high temperature fatigue crack growth rate testing
Published in International Conference on Fracture
2017
Volume: 1
   
Pages: 515 - 516
Abstract
Estimation of crack length is one of the critical aspects of a fatigue crack growth rate testing. Several experimental techniques, such as, visual observation, compliance methods, potential difference techniques, post-failure fractography are used for crack length estimation. In this work, an attempt has been made to correlate the compliance measured from a COD gage with the compliance measured from actuator displacement for a given set of grips and fixtures. Experiments have been carried out at both room temperature as well as two elevated temperatures of 300 °C and 550 °C. A systematic trend between actuator displacement range and COD displacement range was observed as a function of test temperature, which results in decreased actuator compliance. © 2017 ICF 2017 - 14th International Conference on Fracture. All rights reserved.
About the journal
JournalICF 2017 - 14th International Conference on Fracture
PublisherInternational Conference on Fracture
Open AccessNo
Concepts (13)
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    Actuators
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    Cracks
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    Fatigue crack propagation
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    Thermal fatigue
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    ACTUATOR DISPLACEMENT
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    COMPLIANCE METHOD
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    Elevated temperature
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    Experimental techniques
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    HIGH-TEMPERATURE FATIGUE
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    POTENTIAL DIFFERENCE
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    Test temperatures
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    VISUAL OBSERVATIONS
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    Growth rate