A Multiscale Methodology for Simulation of Meccanical Properties of Paper

G. Kettil, A. Målqvist, A. Mark, F. Edelvik, M. Fredlund, K. Wester. 6th European Conference on Computational Mechanics (ECCM 6) 7th European Conference on Computational Fluid Dynamics (ECFD 7), ECCM-ECFD 2018. 11-15 June 2018, Glasgow, UK.


In this work a multiscale framework developed for simulation of mechanical properties of paper is presented. The framework consists of two major parts. In the first part the forming process of a paper machine is simulated using the fiber suspension model developed in [8].  Fluid dynamics together with an advanced contact calculation method enables detailed simulation of the lay  down process. The resulting paper sheet is used as input to the second part of the framework. In the second part the fiber configuration attained from the unique forming simulations is transformed into a network representation, enabling simulation of mechanical properties. The paper mechanics is governed by a fiber network model. To study macroscale properties a novel numerical upscaling method for networks has been developed. In this paper the complete simulation methodology is outlined and discussed.


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