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Microstructure-based modeling of the creep behavior of long-fiber-reinforced thermoplastics

: Fliegener, S.; Luke, M.; Reif, M.

Quaresimin, M. ; University of Padova, Department of Management and Engineering -dtg-; European Society for Composite Materials -ESCM-:
15th European Conference on Composite Materials, ECCM 2012. Proceedings : June 24-28, 2012, Venice, Italy
Padua: University of Padova, 2012
ISBN: 978-88-88785-33-2
7 pp.
European Conference on Composite Materials (ECCM) <15, 2012, Venice>
Conference Paper
Fraunhofer IWM ()

Aim of this work is the prediction of the creep behavior of long-glass-fiber-reinforced polypropylene by microstructural simulations. This paper describes the generation of representative volume elements (RVE) for finite element simulations (FEM) employing a novel approach which takes into account the consolidation process of the composite during fabrication. First, a stack of straight fibers is generated according to the experimentally measured orientation distribution, then the compression of the fiber stack is numerically simulated and finally the remaining pores are filled with matrix elements to form the RVE. The resulting orientation distribution of the RVE is compared with measurements from computer tomography and shows excellent agreement. The capabilities of the FEM model are demonstrated by comparison of the elastic properties of the composite to experimental measurements.