Feature Engineering for Surrogate Models of Consolidation Degree in Additive Manufacturing

Mriganka Roy, Olga Wodo
2021 Materials  
Surrogate models (SM) serve as a proxy to the physics- and experiment-based models to significantly lower the cost of prediction while providing high accuracy. Building an SM for additive manufacturing (AM) process suffers from high dimensionality of inputs when part geometry or tool-path is considered in addition to the high cost of generating data from either physics-based models or experiments. This paper engineers features for a surrogate model to predict the consolidation degree in the
more » ... d filament fabrication process. Our features are informed by the physics of the underlying thermal processes and capture the characteristics of the part's geometry and the deposition process. Our model is learned from medium-size data generated using a physics-based thermal model coupled with the polymer healing theory to determine the consolidation degree. Our results demonstrate high accuracy (>90%) of consolidation degree prediction at a low computational cost (four orders of magnitude faster than the numerical model).
doi:10.3390/ma14092239 pmid:33925364 fatcat:do3l5hsscbajfe6f752n2l42fi