Prediction of the deformed geometry of vat photo-polymerized components using a multi-physical modeling framework

Steyn Westbeek, Joris J.C. Remmers (Corresponding author), J.A.W. (Hans) van Dommelen, Hessel H. Maalderink, Marc G.D. Geers

Research output: Contribution to journalArticleAcademicpeer-review

20 Citations (Scopus)

Abstract

In photopolymerization-based additive manufacturing a complex interplay exists between the vat photopolymerization process characteristics and the (photo-active) resin’s material properties, which governs the trajectory from the input target geometry to the resulting true geometry of a printed component. Particularly for fine featured geometries, there might be a clear mismatch between the latter two. Determining whether the entire component is printable can only be properly assessed through a test-print. The current work proposes an alternative modeling-driven route, which, after system and material characterization, facilitates predicting the geometrical defects of the resulting solidified component (including deformation). This is enabled through a coupled multi-physical modeling of irradiation, photopolymerization, solidification and chemical shrinkage.
Original languageEnglish
Article number101922
Number of pages14
JournalAdditive Manufacturing
Volume40
DOIs
Publication statusPublished - Apr 2021

Funding

This study was funded by the Netherlands Organisation for Applied Scientific Research (TNO) and TU/e Impuls and was carried out in a collaboration between TU/e HTSC and TNO. The authors would like to extend special thanks to Marc van Maris and Niels Vonk for support with CT imaging and indentation experiments and Thomas Hafkamp for fruitful discussion on the effect of inhibition species in the polymerization process.

FundersFunder number
TNO
Netherlands Organisation for Applied Scientific Research

    Keywords

    • Additive manufacturing
    • Digital light processing
    • Mechanical analysis
    • Multi-physical modeling
    • Process simulation
    • Validation study
    • Vat photopolymerization

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