About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Characterization: Structural Descriptors, Data-Intensive Techniques, and Uncertainty Quantification
|
Presentation Title |
Predicting Crack Location Using a Radial Distribution Function as a Unique Descriptor of Pore Networks |
Author(s) |
John M. Erickson, Ashley Spear, Aowabin Rahman |
On-Site Speaker (Planned) |
John M. Erickson |
Abstract Scope |
Additive manufacturing (AM) has opened a wide range of new capabilities in the field of manufacturing. However, due to defects resulting from the build process (namely, porosity), the resulting mechanical behavior of AM specimens can be unpredictable. Our research introduces a new method of uniquely characterizing pore networks using a radial distribution function (RDF), which is then used to predict crack location. The RDF indicates/signals interconnectivity of pores by taking into account pore location, size, and distance to free surface. Using a finite-element-modeling framework, 120 tensile specimens with statistically similar pore networks were virtually tested to failure. The pore networks were characterized by the RDF, which was then compared to the nominal location of fracture. The RDF signal predicted crack locations within a 5% error for 88% of the cases and proved to be a more reliable indicator for fracture than fraction porosity, reduced-cross-section percent, and largest pore diameter. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |