About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
High Resolution Microcrack Growth Analysis in Thermomechanical Fatigue Loading |
Author(s) |
Nicolas Leost, Djamel Missoum-Benziane, Laurent Cameriano, François Comte, Vincent Maurel |
On-Site Speaker (Planned) |
Nicolas Leost |
Abstract Scope |
Combustion chambers of aircraft engines sustain low cycle fatigue in presence of severe thermomechanical gradient. This paper develops an original testing procedure representative of chambers environment using a coplanar biaxial fatigue facility. Thermomechanical fatigue conditions were obtained by temperature cycling thanks to an induction heating device and by prescribing displacements to a cross shaped specimen. Full field analysis of temperature, strain and damage are obtained by infrared thermography (IRT), digital image correlation (DIC) and machine learning (ML) respectively. High temperature displacements acquisition was enabled by a recently developed laser engraved speckle patterns convenient for temperature above 900 °C. On this experimental basis, thermomechanical gradient effect has been investigated by modifying the inductor geometry and location. Finally, finite element analysis (FEA) validated by temperature and strain measurements enables to validate the mechanical behaviour of the tested alloy and to propose microcrack growth rate model accounting for severe gradients in anisothermal fatigue. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Modeling and Simulation, Machine Learning |