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Effect of strain rate, moisture and temperature on the deformation behavior of polymer roll covers

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Abstract

Soft polymer roll covers, which are used in certain positions of paper manufacturing machines, have a vital role in the dynamics of two mating rotating rolls (i.e., nip dynamics). The polymer covers are often used in moist conditions where the loading rates are rather high and temperatures may vary from 45 to 60°C. In this paper, we study the dynamic mechanical behavior of two soft polyurethane composite roll covers under different conditions of temperature, moisture, and loading rate. For the tests in compression, both servohydraulic materials testing machines and the split Hopkinson pressure bar technique were used in the strain rate range of 0.001–1500 s−1. The specimens, which were to be tested under moist conditions, were immersed in paper machine water (pH 4.5) until saturated moisture content was reached. The materials showed remarkable softening as well as decrease in the strain rate sensitivity in moist conditions.

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Authors and Affiliations

  1. Institute of Materials Science, Tampere University of Technology, PO Box 589, FIN-33101, Tampere, Finland

    T. Vuoristo & V. -T. Kuokkala

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  1. T. Vuoristo
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  2. V. -T. Kuokkala
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Vuoristo, T., Kuokkala, V.T. Effect of strain rate, moisture and temperature on the deformation behavior of polymer roll covers. Experimental Mechanics 44, 313–319 (2004). https://doi.org/10.1007/BF02427898

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  • DOI: https://doi.org/10.1007/BF02427898

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