Abstract
It has been shown that the creep and stress-relaxation behaviour of oriented linear polyethylene can be satisfactorily described by a model where two thermally activated processes are acting in parallel. The creep behaviour of an oriented sample which does not reach a constant strain-rate can be described by the addition of a further plastic flow term where the viscosity increases linearly with increasing plastic strain.
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References
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Wilding, M.A., Ward, I.M. Creep and stress-relaxation in ultra-high modulus linear polyethylene. J Mater Sci 19, 629–636 (1984). https://doi.org/10.1007/BF02403251
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DOI: https://doi.org/10.1007/BF02403251