Advertisement

Shear Deformation under Hydrostatic Pressure of Polytetrafluoroethylene and Polycarbonate

  • K. D. Pae
  • J. A. Sauer
  • A. A. Silano

Abstract

In a previous study, the dependence of the shear stress-strain behavior of two polymers, polyoxymethylene (POM) and polypropylene (PP) on hydrostatic pressure was well documented [l]. Furthermore, at a critical shear strain of 0.500, both polymers exhibited a region of concentrated shear strain (girdle) in the central portion of the test specimens. Evidently, instabilities similar to those usually observed in tensile specimens (necking) may also develop in highly deformed torsion specimens. Other researchers have reported the pressure dependence of the shear modulus and the shear yield stress of polymers, but none has reported observing a girdle [2–5]. This study was directed toward the investigation of the pressure-dependent shear stress-strain behavior of two diverse polymers; namely, highly crystalline polytetrafluoroethylene (PTFE) and completely amorphous polycarbonate (PC). In addition, physical changes in the specimens were monitored to ascertain the generality of the shear strain girdle as a manifestation of shear yielding in these materials.

Keywords

Shear Modulus Hydrostatic Pressure Shear Strain Shear Deformation Shear Yield Stress 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    A. A. Silano, K. D. Pae and J. A. Sauer, “Effects of Hydrostatic Pressure on Shear Deformation of Polymers,” to be published in J. Appl. Phys.Google Scholar
  2. 2.
    S. Rabinowitz, I. M. Ward and J. S. C. Parry, J. Mater. Sci. 5, 29 (1970).CrossRefGoogle Scholar
  3. 3.
    E. J. Parry and D. Tabor, J. Mater. Sci. 9, 289 (1974).CrossRefGoogle Scholar
  4. 4.
    W. Wu and A. P. L. Turner, J. Polym. Sci., Polym. Phys. Ed. 13, 1934 (1975).Google Scholar
  5. 5.
    R. A. Duckett and S. H. Joseph, Polymer 17 (A), 329 (1976).CrossRefGoogle Scholar
  6. 6.
    K. D. Pae and A. A. Silano, Rev. Sci. Instrum. 48, 307 (1977).CrossRefGoogle Scholar
  7. 7.
    J. A. Sauer, D. R. Mears and K. D. Pae, Eur. Polym. J. 6, 1015 (1970).CrossRefGoogle Scholar
  8. 8.
    F. D. Murnaghan, Finite Deformation of an Elastic Solid, John Wiley and Sons, New York (1951).MATHGoogle Scholar
  9. 9.
    J. A. Sauer and K. D. Pae, Colloid. Polym. Sci. 252, 680 (1974).CrossRefGoogle Scholar
  10. 10.
    F. Birch, J. Appl. Phys. 8, 129 (1937).CrossRefGoogle Scholar
  11. 11.
    K. D. Pae, J. Mat. Sci. 12, 1209 (1977).CrossRefGoogle Scholar
  12. 12.
    A. W. Christiansen, E. Baer and S. V. Radcliffe, Phil. Mag. 24, 451 (1971).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1979

Authors and Affiliations

  • K. D. Pae
    • 1
  • J. A. Sauer
    • 1
  • A. A. Silano
    • 2
  1. 1.Rutgers UniversityNew BrunswickUSA
  2. 2.Kean College UnionUSA

Personalised recommendations