About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
Multi-time Scaling Techniques for Accelerating Crystal Plasticity Fatigue Simulations of Additively Manufactured Inconel 718 |
Author(s) |
George R. Weber, Saikumar Reddy Yeratapally, Joshua D. Pribe, Edward Glaessgen |
On-Site Speaker (Planned) |
George R. Weber |
Abstract Scope |
Uncertainty in fatigue strength properties is a primary limiting factor for the efficient design and qualification of additively manufactured materials used for aerospace hardware in safety critical applications. Failure of metallic materials in fatigue typically occurs after thousands or millions of loading cycles, causing mechanical property prediction through direct, high-fidelity simulation to become computationally intractable and difficult to validate. This work develops explicit and implicit multi-scale time integration schemes to accelerate crystal plasticity simulations by predicting material state across discrete multi-cycle jumps. These time acceleration methods achieve orders of magnitude speedup for the fatigue simulations while providing controllable accuracy. Furthermore, loading- and material-agnostic features of the techniques are demonstrated. The multi-scale methods are then applied to microstructures of additively manufactured Inconel 718 to explore evolving contributions to fatigue failure beyond initial slip localization. The corresponding cycle-dependent mechanisms are investigated near local neighborhoods of porosity and crystallographic texture. |
Proceedings Inclusion? |
Planned: |