Print Email Facebook Twitter Elastohydrodynamic lubrication of soft-layered rollers and tensioned webs in roll-to-plate nanoimprinting Title Elastohydrodynamic lubrication of soft-layered rollers and tensioned webs in roll-to-plate nanoimprinting Author Snieder, J. (TU Delft Mechatronic Systems Design; Morphotonics B.V.) Dielen, Marc (Morphotonics B.V.) van Ostayen, R.A.J. (TU Delft Mechatronic Systems Design) Date 2023 Abstract This work presents the development of a numerical model for the elastohydrodynamic lubrication of roll-to-plate nanoimprinting with flexible stamps. Roll-to-plate nanoimprinting is a manufacturing method to replicate micro- and nanotextures on large-area substrates with ultraviolet-curable resins. The roller is equipped with a relatively soft elastomeric layer, which elastically deforms during the imprint process. The elastic deformation is described by linear elasticity theory. It is coupled to the pressure build-up in the liquid resin film, which is described by lubrication theory. The flexible stamp, which is treated as a tensioned web, is pre-tensioned around the roller. The elastic deformation of the tensioned web is described by the large-deflection bending of thin plates equations, considering its non-negligible bending stiffness. A Fischer–Burmeister complementarity condition captures the contact mechanics between the tensioned web and the roller. The governing equations combine in a coupled elastohydrodynamic lubrication model, which is fully described by a set of non-dimensional numbers. These are used in a parameter study to investigate the effect on the pressure and film height distributions. It is shown that the bending stiffness of the tensioned web results in an additional hydrodynamic pressure peak and corresponding minimum in the film height, near the inlet of the roller contact. An increase of the bending stiffness corresponds to a decrease in film height. The numerical results are compared with benchmarks from literature and experimentally validated with layer height measurements from flat layer imprints. Good agreement is found between the numerical and experimental results. Subject Elastohydrodynamic lubricationfilm thicknessflexible stamproll-to-plate nanoimprintingsoft-layeredtensioned web To reference this document use: http://resolver.tudelft.nl/uuid:8a325dad-3556-45a2-a491-3769a7532ed4 DOI https://doi.org/10.1177/13506501231183860 Embargo date 2024-01-04 ISSN 1350-6501 Source Institution of Mechanical Engineers. Proceedings. Part J: Journal of Engineering Tribology, 237 (10), 1871-1884 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2023 J. Snieder, Marc Dielen, R.A.J. van Ostayen Files PDF snieder_et_al_2023_elasto ... _plate.pdf 1.5 MB Close viewer /islandora/object/uuid:8a325dad-3556-45a2-a491-3769a7532ed4/datastream/OBJ/view