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Integral Constitutive Model (K-BKZ) to Describe Viscoelastic Flow in Injection Molding

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Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 9 Issue 4

Abstract

A novel theory which employs the K-BKZ viscoelastic integral constitutive model was developed in this study for simulating the non-isothermal injection molding filling process and the frozen stresses of a three-dimensional thin part. The simulation of viscoelastic model in such a problem has not yet been discussed in most previous works as a result of the complexity of this problem. A quasi-steady approximation concept was developed in the present investigation for solving the non-isothermal filling process via K-BKZ viscoelastic integral constitutive model. Additionally, the numerical method of flow field was based on the control volume finite element method. The flow field of generalized Newtonian fluid was used as the initial guess of flow kinematics. The quasi-steady state approximation was introduced for each element to calculate the flow kinematics and stress profile from the K-BKZ integral constitutive model. The finite difference method with streamline upwind characteristic was adopted here for calculating the temperature field of process. When the cavity is fully filled, the subsequent non-isothermal stresses would relax after cessation of flow. Thereby, the frozen stresses (or frozen birefringence) could be obtained.

* Mail address: Prof. Dr. Rong-Yeu Chang. Dpt. of Chemical Engineering, National Tsing-Hua University, Hsinchu, Taiwan 30043, Republic of China.
Received: 1994-1-12
Accepted: 1994-6-16
Published Online: 2013-05-27
Published in Print: 1994-12-01

© 1994, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Eleventh in a Series: Fried Krupp: Pioneer Integrated Steel and Processing Machinery Manufacturer. Part 2 – Post World War II Development, Kautex, Corpoplast and Werner and Pfleiderer
  5. Internal Mixers
  6. Analysis of Mixing Performance in a VIC Mixer
  7. Screw Extrusion
  8. Extrusion of Short Fibre Reinforced PP
  9. Simulation of Non-isothermal Flow in Twin Screw Extrusion
  10. Reactive Processing
  11. Compatibilization and Dynamic Vulcanization of PA 6/Isobutylene Methylstyrene Elastomer
  12. Thermal Effects in Extrusion: Slit Dies
  13. Die Extrusion
  14. Functionalization of Polypropylene with Maleic Anhydride by Reactive Extrusion
  15. Fiber and Film Processing
  16. Stationary and Dynamic Analysis of Film Casting Process
  17. An Experimental Study of a Bicomponent Coextrusion Fiber Spinning
  18. Molding
  19. Integral Constitutive Model (K-BKZ) to Describe Viscoelastic Flow in Injection Molding
https://doi.org/10.3139/217.940365

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Eleventh in a Series: Fried Krupp: Pioneer Integrated Steel and Processing Machinery Manufacturer. Part 2 – Post World War II Development, Kautex, Corpoplast and Werner and Pfleiderer
  5. Internal Mixers
  6. Analysis of Mixing Performance in a VIC Mixer
  7. Screw Extrusion
  8. Extrusion of Short Fibre Reinforced PP
  9. Simulation of Non-isothermal Flow in Twin Screw Extrusion
  10. Reactive Processing
  11. Compatibilization and Dynamic Vulcanization of PA 6/Isobutylene Methylstyrene Elastomer
  12. Thermal Effects in Extrusion: Slit Dies
  13. Die Extrusion
  14. Functionalization of Polypropylene with Maleic Anhydride by Reactive Extrusion
  15. Fiber and Film Processing
  16. Stationary and Dynamic Analysis of Film Casting Process
  17. An Experimental Study of a Bicomponent Coextrusion Fiber Spinning
  18. Molding
  19. Integral Constitutive Model (K-BKZ) to Describe Viscoelastic Flow in Injection Molding
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