Polymer Mechanics

, Volume 10, Issue 5, pp 723–726 | Cite as

Investigation of the deformation and failure of polypropylene under indenters of different shapes

  • Yu. P. Chizhov
  • V. V. Kovriga


In order to study the residual strain distribution in a nontransparent polymer (polypropylene) under identers of various shapes (sphere, cone, cylinder) multilayer colored specimens with a predetermined distribution of the layers were used. By cutting along selected planes it was possible to estimate the residual strains in the interior of the specimen, both qualitatively and quantitatively. By this means we investigated the relations between the reversible and residual strains in polypropylene as a function of the indenter penetration depth and, moreover, the relations between the deformed and failed volumes of polymeric material under indenters of different shapes. It was shown that a change in indenter shape may produce a considerable change (by a factor of 3 or more) in the relations between the penetration, strain propagation, and failure volumes, which should be taken into account both in determining the hardness of polymeric materials by different methods and in selecting the shape of sealing elements.


Polymer Polypropylene Penetration Depth Polymeric Material Strain Distribution 
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Literature cited

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    G. A. Smirnov-Alyaev, Resistance of Materials to Plastic Deformation [in Russian], Leningrad (1949).Google Scholar
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    V. V. Kovriga and Yu. P. Chishov, Soviet Patent No. 355547; Otk., Izobret., Prom Obraztsy i Tov. Znaki, No. 31 (1972).Google Scholar
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    S. B. Ainbinder and M. G. Laka, Mekhan. Polim., No. 3, 393 (1966).Google Scholar

Copyright information

© Plenum Publishing Corporation 1976

Authors and Affiliations

  • Yu. P. Chizhov
  • V. V. Kovriga

There are no affiliations available

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