About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Characterization: Structural Descriptors, Data-Intensive Techniques, and Uncertainty Quantification
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Presentation Title |
Uncertainty Quantification Techniques Applied to Ductile Damage Predictions in the 3rd Sandia Fracture Challenge |
Author(s) |
James Sobotka, John McFarland |
On-Site Speaker (Planned) |
James Sobotka |
Abstract Scope |
The 3rd Sandia Fracture Challenge involved blind predictions of ductile damage in a unique 3D geometry built using a laser powder-bed fusion process. Here, efficient uncertainty quantification techniques are needed due to high computational costs per analysis and increased variability of material properties in additively manufactured alloys. This presentation describes a modeling and simulation framework with ensemble studies as the fundamental unit of analysis. This framework supports uncertainty quantification by rigorous statistical methods and fast-running surrogate models. In this framework, results from computational designs of experiment provide input for Gaussian process models operating on principal components that define the quantities of interest. Results shown in this presentation exercise the fast-running surrogate models to calibrate material property distributions and to predict load-displacement curves and load-strain curves at expected, 20th percentile, and 80th percentile levels. Measurements from corresponding experiments are shown for comparison. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |