Lab members (Prof. Chen, Dan and Feifei) attended the ISFA (International Symposium on Flexible Automation) 2020 virtual conference (July 8 – 9, 2020) and were nominated for the finalist of ISFA 2020 best paper award in Theory
Dan presented her work on “Closed-loop Simulation Integrating Finite Element Modeling with Feedback Controls in Powder Bed Fusion Additive Manufacturing”, and was nominated for the finalist of ISFA 2020 best paper award in theory. Good job!
- Paper information: Powder bed fusion (PBF) additive manufacturing has enabled unmatched agile manufacturing of a wide range of products from engine components to medical implants. While high-fidelity finite element modeling and feedback control have been identified key for predicting and engineering part qualities in PBF, existing results in each realm are developed in opposite computational architectures wildly different in time scale. Integrating both realms, this paper builds a first-instance closed-loop simulation framework by utilizing the output signals retrieved from the finite element model (FEM) to directly update the control signals sent to the model. The proposed closed-loop simulation enables testing the limits of advanced controls in PBF and surveying the parameter space fully to generate more predictable part qualities.
Feifei presented her work on “Active interlayer heating for sustainable selective laser sintering with reclaimed polyamide 12 powders”. Way to go!
- Paper information: Failure to recycle and reuse these aged powders not only leads to economic losses but also is environmentally unfriendly. Limited procedures exist for systematically reusing the aged powders. This work proposes a systematic method to maximize the reusability of aged and extremely aged polyamide 12 powders. Building on a previously untapped interlayer heating, pre-processing, and a systematic mixing of powder materials, we show how reclaimed polyamide 12 powders can be consistently reprinted into functional samples, with mechanical properties even superior to current industrial norms.