2020
DOI: 10.3390/jcs4040163
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Calibration of Fiber Orientation Simulations for LFT—A New Approach

Abstract: Short fiber reinforced thermoplastics (SFT) are extensively used due to their excellent mechanical properties and low processing costs. Long fiber reinforced thermoplastics (LFT) show an even more interesting property profile and are increasingly used for structural parts. However, their processing by injection molding is not as simple as for SFT, and their anisotropic properties resulting from the fiber microstructure (fiber orientation, length, and concentration) pose a challenge with regard to the engineeri… Show more

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Cited by 7 publications
(4 citation statements)
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“…This procedure assumes that the particle orientation is maintained during drying as strong reorientations during drying would severely hinder such a calibration mechanism. Successful calibrations, however, have been reported for similar systems [ 2 , 66 , 68 ]. As such, the small amount of reorientation during drying that we measured in our work agrees well with these findings.…”
Section: Discussionmentioning
confidence: 99%
“…This procedure assumes that the particle orientation is maintained during drying as strong reorientations during drying would severely hinder such a calibration mechanism. Successful calibrations, however, have been reported for similar systems [ 2 , 66 , 68 ]. As such, the small amount of reorientation during drying that we measured in our work agrees well with these findings.…”
Section: Discussionmentioning
confidence: 99%
“…This process can cause a local variation of the fibre concentration, which may lead to a change along the flow path of the material as well as through the thickness of the moulded part. A high shear flow gradient in the edge regions leads to the formation of a boundary layer directed parallel to the flow direction, while the fibre orientation in the core region is perpendicular to the global flow direction [7]. Thus, in simplified terms, it can be assumed that injection-moulded thermoplastics reinforced with short fibres can be described by the three-layer model shown in Figure 1.…”
Section: Injection Moulding Of Short Fibre-reinforced Polymersmentioning
confidence: 99%
“…We find the FT model to greatly predict the orientation in all kinds of different suspensions that originate from the fact that underlying hydrodynamics have such a strong influence on the orientation. With respect to the FT parameter, there is evidence that one fixed parameter is enough, but this parameter, however, should be calibrated once (e.g., by the mechanism by Willems et al [48]), taking care of the exact FT model formulation including the closure approximation.…”
Section: Accuracy Of the Ft Model In Comparison To Other Prediction Modelsmentioning
confidence: 99%