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Effect of temperature — Time factors on the yield point of crystalline polymers in the flat stressed state (high-density polyethylene)

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Conclusions

1. Experiments have been performed on biaxial stretching of HDPE over a wide range in ratios of the principal stress components, strain rates, and temperature. The character of change in the limiting characteristics of HDPE are different in different temperature regions.

2. The limiting resistance of HDPE in the flat stressed state for T=const and vɛi=const is described satisfactorily by the Malmeister and Gol'denblat-Kopnov criteria.

3. Prediction of the limiting resistance of HDPE should be carried out within limited temperature ranges, in which similarity of strain diagrams, a similar character of structural changes in the material (accumulation of damage), and identical character of change in its limiting characteristics are observed.

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Literature cited

  1. 1.

    V. I. Kovpak, "The problem of predicting flow of heat-resistant materials," Probl. Prochn., No. 4, 56–63 (1971).

  2. 2.

    A. Ya. Gol'dman and V. V. Shcherbak, "Temperature—time dependence of long-term strength and fatigue of some partially crystalline polymers," Probl. Prochn., No. 11, 31–37 (1974).

  3. 3.

    V. I. Kovpak, "Recalculation of heat-resistance indices for various temperatures," Zavod. Lab., No. 12, 1492–1498 (1971).

  4. 4.

    A. M. Grinman and A. Ya. Gol'dman, "Long-term strength of polyethylene under conditions of biaxial stretching," Mekh. Polim., No. 3, 401–408 (1976).

  5. 5.

    A. Ya. Gol'dman and A. M. Grinman, "Effect of temperature—time factors on limiting resistance of crystalline polymers in simple flat loading, (polytetrafluoroethylene)," Mekh. Polim., No. 6, 988–1001 (1976).

  6. 6.

    A. M. Grinman and A. Ya. Gol'dman, "A method of testing polymers in the flat stressed state," Mekh. Polim., No. 2, 378 (1974).

  7. 7.

    A. Nadai, Plasticity and Failure of Solids [in Russian], Moscow (1954).

  8. 8.

    K. Schmieder and K. Wolf, "Mechanische Relaxationser scheinungen an Hochpolymeren (Beziehungen zur Struktur)," Kolloidn.-Z.,134, No. 2, 149–185 (1953).

  9. 9.

    A. Ya. Gol'dman and A. M. Grinman, "A variant of temperature—time analogy for partially crystalline polymers (high-density polyethylene)," Mekh. Polim., No. 2, 261–269 (1974).

  10. 10.

    A. Ya. Gol'dman and K. A. Vylegzhanina, "Effect of temperature—time factors on the growth kinetics and character of the failure of some amorphous polymers," Fiz.-Khim. Mekh. Mater., No. 4, 69–75 (1973).

  11. 11.

    A. Ya. Gol'dman, V. V. Shcherbak, and S. Ya. Khaikin, "The equivalent damage hypothesis in investigation of the long-term strength of polymers at various temperatures," Probl. Prochn., No. 7, 85–86 (1975).

  12. 12.

    K. Richard and R. Ewald, "Extrapolationsverfahren, Sicherheitsbeiwerte und Zulässige Rohrwands-beanspruchung von Polyäthylen- und PVC-Rohren," Kunststoffe,49, No. 3, 116–120 (1959).

  13. 13.

    A. K. Malmeister, V. P. Tamuzh, and G. A. Teters, Resistance of Stiff Polymeric Materials [in Russian], 2nd ed., Riga (1972).

  14. 14.

    I. I. Gol'denblat and V. A. Kopnov, Criteria of Strength and Plasticity of Constructional Materials [in Russian], Moscow (1968).

  15. 15.

    K. V. Zakharov, "A strength criterion for laminar plastics," Plast. Massy, No. 8, 59–62 (1961).

  16. 16.

    A. M. Skudra, F. Ya. Bulavs, and K. A. Rotsens, Flow and Static Fatigue of Reinforced Plastics [in Russian], Riga (1971).

  17. 17.

    A. Ya. Gol'dman and A. L. Rabinovich, "Strength and strain relationships in shear of some polymerbinders," Mekh. Polim., No. 2, 214–228 (1966).

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Additional information

Okhtinsk "Plastpolimer" Scientific and Production Union, Leningrad. Translated from Mekhanika Polimerov, No. 2, pp. 247–254, March–April, 1977,

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Gol'dman, A.Y., Grinman, A.M. Effect of temperature — Time factors on the yield point of crystalline polymers in the flat stressed state (high-density polyethylene). Polymer Mechanics 13, 226–232 (1977). https://doi.org/10.1007/BF00859590

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Keywords

  • Polymer
  • Polyethylene
  • Stressed State
  • Structural Change
  • Yield Point