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Analysis and modelling of the die drawing of polymers

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Abstract

An analysis of the mechanics of the die-drawing process for polymer orientation has been undertaken on the basis of the lower bound theory by Hoffman and Sachs for metals, with several important modifications. First it is accepted that the flow stress in polymers is strongly dependent on plastic strain, strain rate and temperature. Secondly, thermal effects during die drawing due to heat generated by plastic deformation are included in the analysis. Finally, the temperature distribution in the die is estimated, taking into account both heat condition and axial translation of the polymer during the drawing process. Good agreement was obtained between theoretically predicted drawing stresses and those determined experimentally for a range of drawing speeds.

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Author notes

  1. S. N. Kukureka

    Present address: School of Metallurgy and Materials, University of Birmingham, Birmingham, UK

Authors and Affiliations

  1. Interdisciplinary Research Centre for Polymer Science and Technology, University of Leeds, LS2 9JT, UK

    S. N. Kukureka & I. M. Ward

  2. Department of Mechanical Engineering, University of Leeds, LS2 9JT, UK

    G. Craggs

Authors
  1. S. N. Kukureka
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  2. G. Craggs
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  3. I. M. Ward
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Kukureka, S.N., Craggs, G. & Ward, I.M. Analysis and modelling of the die drawing of polymers. J Mater Sci 27, 3379–3388 (1992). https://doi.org/10.1007/BF01116040

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  • DOI: https://doi.org/10.1007/BF01116040

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