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Mechanical Behavior of Plastics

Graduate · Historical course

Spring 2007

This course is aimed at presenting the concepts underlying the response of polymeric materials to applied loads. These will include both the molecular mechanisms involved and the mathematical description of the relevant continuum mechanics. It is dominantly an "engineering" subject, but with an atomistic flavor. It covers the influence of processing and structure on mechanical properties of synthetic and natural polymers: Hookean and entropic elastic deformation, linear viscoelasticity, composite materials and laminates, yield and fracture.

Readings

  • Ward, I. M., and J. Sweeney. An Introduction to the Mechanical Properties of Solid Polymers . 2nd ed. New York, NY: John Wiley & Sons, 2004. ISBN: 9780471496267.
    Listed reading
  • Roylance, David. Mechanics of Materials . New York, NY: John Wiley, 1995. ISBN: 9780471593997.
    Listed reading
  • In extending the direct method of stress analysis presented in previous modules to geometrically more complex structures, it will be convenient to have available somewhat more general mathematical statements of the kinematic, equilibrium, and constitutive equations; this is the objective of the present chapter. These equations also form the basis for more theoretical methods in stress analysis, as well as for numerical approaches such as the finite element method. We will also seek to introduce some of the notational schemes used widely in the technical literature for such entities as stress and strain. Depending on the specific application, both index and matrix notations can be very convenient; these are described in a separate module.
    Listed reading
  • LEC #: 2 · TOPICS: Chemical composition · READINGS: Ward, pp. 1-4.
    Reading assignment
  • IUD paper: Roylance, David. “Assessment of Olefin-Based IUD Tail Strings.” Journal of Applied Biomaterials 4 (1993): 289-301.
    Listed reading
  • Spherulite paper: Starkweather, Howard W. Jr., and Richard E. Brooks. “Effect of Spherulites on the Mechanical Properties of Nylon 66.” Journal of Applied Polymer Science 1 (1959): 236-239.
    Listed reading
  • LEC #: 4 · TOPICS: Elastic response · READINGS: Module 1, pp. 1-8.
    Reading assignment
  • LEC #: 9 · TOPICS: Gaussian chain statistics · READINGS: Ward, pp. 32-36.
    Reading assignment
  • LEC #: 11 · TOPICS: Elastomer mechanics · READINGS: Module 6.
    Reading assignment
  • Boyer article: Boyer, R. F. “Dependence of Mechanical Properties on Molecular Motion in Polymers.” Polymer Engineering and Science 8 (1968): 161-185.
    Listed reading
  • LEC #: 19 · TOPICS: Effect of temperature · READINGS: Module 19, pp. 19-23.
    Reading assignment
  • Struik article: Struik, L. C. E. “Physical Aging in Plastics and Other Glassy Materials.” Polymer Engineering and Science 17 (1977): 165-173.
    Listed reading
  • LEC #: 22 · TOPICS: Stress analysis: Superposition · READINGS: Module 19, pp. 26-28.
    Reading assignment
  • Composites degradation article: Kumar, Bhavesh G., Raman P. Singh, and Toshio Nakamura. “Degradation of Carbon Fiber-reinforced Epoxy Composites by Ultraviolet Radiation and Condensation.” Journal of Composite Materials 36 (2002): 2713-2733.
    Listed reading
  • Gillham article: Gillham, John K. “Formation and Properties of Thermosetting and High Tg Polymeric Materials.” Polymer Engineering and Science 26 (1986): 1429-1433.
    Listed reading
  • Tuttle-Brinson article: Tuttle, M. E., and H. F. Brinson. “Prediction of the Long-Term Creep Compliance of General Composite Laminates.” Experimental Mechanics 26 (1986): 89-102.
    Listed reading
  • Sternstein-Ongchin article: Sternstein, S. S., and L. Ongchin. “Yield Criteria for Plastic Deformation of Glassy High Polymers in General Stress Fields.” Polymer Preprints 10 (1969): 1117-1124.
    Listed reading
  • Zhurkov article: Zhurkov, S. N. “Kinetic Concept of the Strength of Solids.” International Journal of Fracture Mechanics 1 (1965): 311-322.
    Listed reading
  • Roylance article: Roylance, David K. “Characterization of Polymer Deformation and Fracture.” Chapter 13 in Applications of Polymer Spectroscopy . Edited by Edward G. Brame. New York, NY: Academic Press, 1978. ISBN: 9780121254506.
    Listed reading
  • Williams article: Williams, M. L. “Fracture in Viscoelastic Media.” Fundamental Phenomena in the Materials Sciences 4 (1967): 23-32.
    Listed reading
  • LEC #: 36 · TOPICS: Fracture: Crack-tip stresses, stress intensity factor · READINGS: Module 23, pp. 7-9.
    Reading assignment
  • LEC #: 38 · TOPICS: Fracture: Effect of specimen geometry · READINGS: Module 23, pp. 10-13.
    Reading assignment
  • LEC #: 39 · TOPICS: Fracture: J-integral and viscoelasticity · READINGS: ABS article: Lu, Ming-Luen, Chang-Bing Lee, and Feng-Chih Chang. “Fracture Toughness of Acrylonitrile-Butdiene-Styrene by J -Integral Methods.” Polymer Engineering and Science 35 (1995): 1433-1439.
    Reading assignment
  • Ward, I. M., and J. Sweeney. An Introduction to the Mechanical Properties of Solid Polymers. 2nd ed. New York, NY: John Wiley & Sons, 2004. ISBN: 9780471496267.
    Listed reading
Sources