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)
  • 발행 : 2003.12.01

초록

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.

키워드

참고문헌

  1. Rheol. Acta v.30 Calculation of residual stresses in injection molded products Baaijens,F.P.T. https://doi.org/10.1007/BF00366642
  2. Advances in Polymer Technology v.21 Simulation of injection-compression molding process, Part 3: Effect of process conditions on part birefringence Chen,S.C.;Y.C.Chen;H.S.Peng https://doi.org/10.1002/adv.10024
  3. Modeling of polymer processing: Recent developments, Hanser, Munich Famili,N.;A.I.Isayev
  4. Polym. Eng. Sci. v.33 Buildup and relaxation of molecular orientation in injection molding. Part I:Formulation Flaman,A.A. https://doi.org/10.1002/pen.760330402
  5. AIChE J. v.35 The birefringence problem in optical disk substrates: A modeling approach Greener,J.;R.Kesel;B.A.Contestable https://doi.org/10.1002/aic.690350313
  6. Int. Polym. Process. v.14 Residual stresses and birefringence in injection molding of semicrystalline polymer Guo,X.;A.I.Isayev https://doi.org/10.3139/217.1564
  7. Polym. Eng. Sci. v.23 orientation development in the injection molding of amorphous polymers Isayev,A.I. https://doi.org/10.1002/pen.760230507
  8. Modeling of polymer processing: Recent development Isayev,A.I.(ed.)
  9. Rheol. Acta v.19 Toward a viscoelastic modeling of the injection molding of polymers Isayev.A.I.;C.A.Hieber https://doi.org/10.1007/BF01521928
  10. Injection and compression molding fundamentals Isayev,A.I.(ed.)
  11. Polymer melt rheology and flow birefringence Janeschitz-Kriegl H.
  12. Polym. Eng. Sci. v.39 Numerical modeling of injection/compression molding for centergated disk: Part 1. Injection molding with viscoelastic compressible fluid model Kim,I.H.;S.J.Park;S.T.Chung;T.H.Kwon https://doi.org/10.1002/pen.11586
  13. Polym. Eng. Sci. v.42 Numerical prediction of residual stresses and birefringence in injection/compression molded center-gated disk. Part 1: Basic modeling and results for injection molding Lee,Y.B.;T.H.Kwon;K.Yoon https://doi.org/10.1002/pen.11114
  14. Appl. Optics v.25 Compact magnetooptical disk for coded data storage Ojima,M.;A.Saito;T.Kaku;M.Ito.;Y.Tsunoda;S.Takayama;Y.Sugita https://doi.org/10.1364/AO.25.000483
  15. Ph.D. Dissertation, The University of Akron Birefringence and residual stresses in molded articles of amorphous polymers Shyu,G.D.
  16. SPE ANTEC Tech Papers v.41 Residual stresses and birefringence in infection molded disks Shyu,G.D.;A.I.Isayev
  17. Rubb Chem. Tech. v.62 Viscoelastic simulation of flow of rubber compounds Sobhanie,M.;A.I.Isayev https://doi.org/10.5254/1.3536285
  18. J. Appl. Polym. Sci. v.32 Molecular orientation distribution in injection-molded polycarbonate discs Takeshima,M.;N.Funakoshi https://doi.org/10.1002/app.1986.070320209
  19. J. Polym. Eng. v.7 Dynamic simulation and graphics for the injection molding of three-dimensional thin parts Wang,V.W.;C.A.Hieber;K.K.Wang
  20. Prog. Polym. Sci. v.20 Assessment of orientation stress and density distributions in injection-molded amorphous polymers by optical techniques Wimbereger-Friedl,R. https://doi.org/10.1016/0079-6700(94)00036-2
  21. Korean J. of Rheol. v.7 An experimental study on precision injection molding of center-gated disks Yoon,K.
  22. J. Appl. Polym. Sci. v.44 Simulation of microstructure development in injection molding of engineering plastics Yu,J.S.;A.H.Wagner;D.M.Kalyon https://doi.org/10.1002/app.1992.070440313