Korea-Australia Rheology Journal

The Korean Society of Rheology (한국유변학회)
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Numerical simulation of flow-induced birefringence in injection molded disk

  • Shyu, Goang-Ding (Institute of Polymer Engineering, The University of Akron) ;
  • Avraam I. Isayev (Institute of Polymer Engineering, The University of Akron) ;
  • Lee, Ho-Sang (Department of Mechanical Design Engineering, Chungju National University)
  • Published : 2003.12.01
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Abstract

This study is an attempt to understand the birefringence and stress development in an injection molded disk. A computer code was developed to simulate all three stages of the injection molding process filling, packing and cooling by finite element method. The constitutive equation used here was compressible Leonov model. The PVT relationship was assumed to follow the Tait equation. The flow-induced birefringence was related to the calculated flow stresses through the linear stress-optical law. The predicted birefringence was in good agreement with the experimental results.

Keywords

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