Polymer Mechanics

, Volume 3, Issue 5, pp 586–589 | Cite as

Bending of prestressed glass-reinforced plastic beams

  • I. G. Zhigun


Initial waviness of the fibers and prestressing are investigated in relation to their effect on flexural stiffness and strength for beams with low shear strength. It is shown that prestressing the reinforcement increases the flexural stiffness but at the same time adds to the shear correction as a result of an increase in the modulus of elasticity Ex in the direction of reinforcement and the insensitivity of the shear modulus Gxz to prestress. It is established that prestressing increases the shear strength and the degree of anisotropy β. Materials of two types are investigated: unidirectional (AG-4S) and cloth-reinforced (SKT-11).


Anisotropy Shear Strength Shear Modulus Flexural Stiffness Plastic Beam 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    V. V. Bolotin, Mekh. polim. [Polymer Mechanics], 1, 11, 1966.Google Scholar
  2. 2.
    Yu. M. Tarnopol'skii, G. G. Portnov, and I. G. Zhigun, Mekh. polim. [Polymer Mechanics], 2, 243, 1967.Google Scholar
  3. 3.
    E. I. Timofeev, Calculation of Reinforced Plastic Structural Elements [in Russian], PNTPO, No. 13-63-253/12 GOSINTI, Moscow, 1963.Google Scholar
  4. 4.
    Yu. M. Tarnopol'skii and A. M. Skudra, Structural Strength and Deformation of Glass-Reinforced Plastics [in Russian], Riga, 1966.Google Scholar
  5. 5.
    V. V. Bolotin, Izv. AN SSSR, Mekhanika, 1, 74, 1965.Google Scholar
  6. 6.
    S. Goldfein, Mod. Plast., 33, 8, 1956.Google Scholar
  7. 7.
    S. G. Lekhnitskii, Anisotropic Plates [in Russian], GITL, 1950.Google Scholar
  8. 8.
    N. M. Belyaev, Strength of Materials [in Russian], Moscow, 1954.Google Scholar
  9. 9.
    Yu. M. Tarnopol'skii, A. V. Roze, and V. A. Polyakov, Mekh. polim. [Polymer Mechanics], 2, 38, 1965.Google Scholar
  10. 10.
    Yu. M. Tarnopol'skii and A. V. Roze, Mekh. polim. [Polymer Mechanics], 4, 535, 1966.Google Scholar

Copyright information

© Consultants Bureau 1971

Authors and Affiliations

  • I. G. Zhigun
    • 1
  1. 1.Institute of Polymer Mechanics AS LatvSSRRiga

Personalised recommendations