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On the determination of the relaxation modulus of PP compounds from arbitrary strain histories

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Abstract

Advanced evaluation methods for the determination of linear viscoelastic material functions have been developed already forty years ago, but it is still common practice to use the so-called ten-times rule. The rule is that a sufficiently long time needs to pass after a constant load or strain is applied so that the material response is close to the response of step excitation. A substantial amount of experimental data in the short-term range has to be discarded to obtain valid results. Renewed attention has been given to improving this situation during the last few years. In this paper, the application of modern evaluation techniques to the determination of the relaxation modulus of isotropic homogeneous linear viscoelastic materials is presented. A new method that is applicable to general strain histories is introduced and applied to different loading types.

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Author notes

  1. Michael Jerabek

    Present address: Borealis Polyolefine GmbH, St. Peter Strasse 25, 4021, Linz, Austria

  2. Zoltan Major

    Present address: Institute of Polymer Product Engineering, Johannes Kepler University Linz, Altenbergerstrasse 69, 4021, Linz, Austria

  3. Reinhold W. Lang

    Present address: Institute of Polymeric Materials and Testing, Johannes Kepler University Linz, Altenbergerstrasse 69, 4021, Linz, Austria

Authors and Affiliations

  1. Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700, Leoben, Austria

    Daniel Tscharnuter & Michael Jerabek

  2. Institute of Materials Science and Testing of Plastics, Franz-Josef-Strasse 18, 8700, Leoben, Austria

    Zoltan Major & Reinhold W. Lang

Authors
  1. Daniel Tscharnuter
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  2. Michael Jerabek
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  3. Zoltan Major
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  4. Reinhold W. Lang
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Correspondence to Daniel Tscharnuter.

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Tscharnuter, D., Jerabek, M., Major, Z. et al. On the determination of the relaxation modulus of PP compounds from arbitrary strain histories. Mech Time-Depend Mater 15, 1–14 (2011). https://doi.org/10.1007/s11043-010-9119-4

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  • DOI: https://doi.org/10.1007/s11043-010-9119-4

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