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Prediction of residual flow and thermoviscoelastic stresses in injection molding

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Abstract

A general model for predicting the total residual stresses generated during filling and cooling stages of injection-molded parts has been developed. The model takes into account the phenomena associated with non-isothermal stress relaxation. The main hypothesis in our approach is to use the kinematics of a generalized Newtonian fluid at the end of the filling stage as the initial state for the calculation of residual flow stresses. These stresses are calculated using a single integral rheological model (Wagner model). The calculation of stresses developed during the cooling stage is based on a thermoviscoelastic model with structural relaxation. Illustrative results emphasizing the effect of both the melt temperature and the flow rate during the filling stage are presented.

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Authors and Affiliations

  1. Département de génie chimique, Ecole Polytechnique de Montréal, Montréal, Canada

    K. K. Kabanemi & Philippe A. Tanguy

  2. Département de genie chimique, Université Laval, Québec, Canada

    Abdellatif Aït-Kadi

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  1. K. K. Kabanemi
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  2. Abdellatif Aït-Kadi
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  3. Philippe A. Tanguy
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Kabanemi, K.K., Aït-Kadi, A. & Tanguy, P.A. Prediction of residual flow and thermoviscoelastic stresses in injection molding. Rheol Acta 34, 97–108 (1995). https://doi.org/10.1007/BF00396058

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  • DOI: https://doi.org/10.1007/BF00396058

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