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Fiber Orientation in 3-D Injection Molded Features

Prediction and Experiment
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Published/Copyright: June 20, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 14 Issue 4

Abstract

We present a finite element method for predicting the fiber orientation patterns in 3-D injection molded features, and compare the predictions to experiments. The predictions solve the full balance equations of mass, momentum, and energy for a generalized Newtonian fluid. A second-order tensor is used to describe and calculate the local fiber orientation state. A standard Hele-Shaw molding filling simulation is used to provide inlet boundary conditions for the detailed inite element models, which are limited to the local geometry of each feature. The experiments use automated image analysis of polished cross-sections to determine fiber orientation as a function of position. Predictions compare well with experiments on a transverse rib, where the detailed calculation can be 2-D. Results of a 3-D calculation for a flow-direction rib also show generally good agreement with experiments. Some errors in this latter calculation are caused by not simulating the initial filling of the rib, due to computational limits.

* Mail address: Prof. Dr. C. L. Tucker, III, Dept. of Mechanical and Industrial Engineeering, University of Illinois, 1206 W Green St., Urbana, IL 61801, USA
Received: 1999-6-22
Accepted: 1999-10-4
Published Online: 2013-06-20
Published in Print: 1999-12-01

© 1999, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Editorial
  2. Fifth of a Series: Pioneer of Polymer Processing John Wesley Hyatt (1837–1920)
  3. Internal Mixer
  4. Modeling the Distributive Mixing in an Internal Batch Mixer
  5. Biomedical Engineering
  6. Processing of Biodegradable Polymer Composites as A Drug Delivery System in Vitro
  7. Fibers and Films
  8. Tensile Force Measurements in the PA 6 High Speed Fiber Spinning and their Utility
  9. Crosslinking Modification of UHMWPE Fibers by Ultra-violet Irradiation
  10. Effect of Wall Slip on Rheotens Mastercurves for Linear PE Melts
  11. Stability of a Blown Film Extrusion Process
  12. Molding
  13. Blank Design and Fiber Orientation Distribution During Compression Molding of GMT
  14. Injection Moulding of a Commercial β-Nucleated Polypropylene
  15. Weld Line Strength in PC/ABS Injection Moldings
  16. Computer Controlled Rotational Molding of a Hollow Femur for 3-D Photoelastic Analysis
  17. Residual Stresses and Birefringence in Injection Molding of Semicrystalline Polymer
  18. Residual Stresses and Birefringence in Injection Molding of Semicrystalline Polymer
  19. Generalized Predictive Observer-Controller For Injection Moulding
  20. Fiber Orientation in 3-D Injection Molded Features
https://doi.org/10.3139/217.1568

Articles in the same Issue

  1. Editorial
  2. Fifth of a Series: Pioneer of Polymer Processing John Wesley Hyatt (1837–1920)
  3. Internal Mixer
  4. Modeling the Distributive Mixing in an Internal Batch Mixer
  5. Biomedical Engineering
  6. Processing of Biodegradable Polymer Composites as A Drug Delivery System in Vitro
  7. Fibers and Films
  8. Tensile Force Measurements in the PA 6 High Speed Fiber Spinning and their Utility
  9. Crosslinking Modification of UHMWPE Fibers by Ultra-violet Irradiation
  10. Effect of Wall Slip on Rheotens Mastercurves for Linear PE Melts
  11. Stability of a Blown Film Extrusion Process
  12. Molding
  13. Blank Design and Fiber Orientation Distribution During Compression Molding of GMT
  14. Injection Moulding of a Commercial β-Nucleated Polypropylene
  15. Weld Line Strength in PC/ABS Injection Moldings
  16. Computer Controlled Rotational Molding of a Hollow Femur for 3-D Photoelastic Analysis
  17. Residual Stresses and Birefringence in Injection Molding of Semicrystalline Polymer
  18. Residual Stresses and Birefringence in Injection Molding of Semicrystalline Polymer
  19. Generalized Predictive Observer-Controller For Injection Moulding
  20. Fiber Orientation in 3-D Injection Molded Features
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