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Some Aspects of Shear Yielding and Emergence of Shear Bands in Solid Polymers

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In this work, we first recapitulate experimental findings under different testing conditions available in the literature. Next, we establish a theoretical framework for the analysis of evolution of deformation into a highly localized pattern, where the theoretical approach with necessary adjustments to accommodate the constitutive behaviour of the solid polymer is applied in the course of development. A detailed theoretical analysis of critical stress conditions required for shear band initiation shows that in order to predict the material instability in accordance with experimental findings it is necessary to introduce a multi-parameter type of constitutive relation.
  • Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia
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