Authors
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Lauke, B.
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Title
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Fracture toughness modelling of polymers filled with inhomogeneously distributed particles
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Date
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01.07.2017
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Number
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51725
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Abstract
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Filler particles are not homogeneously distributed in real composites consisting of polymer matrices and rigid spherical particles. In the presence of a crack, high multiaxial stresses develop in the material which are a function of the distance from the crack tip. This variation effects the stress concentration in the periphery of the inhomogeneously distributed particles. For a certain stress level closer particles are able to debond from the matrix while particle pairs with larger centre to centre distances may still be bonded to the matrix. Based on a two particle model, the debonding and matrix yielding energies were calculated. Subsequent integration over the local composite deformation results in the fracture toughness of such composites. Randomly distributed particles provide a lower fracture toughness in modelling as compared to inhomogeneoulsy distributed particles in the composite.
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Publisher
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eXPRESS Polymer Letters
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Wikidata
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Citation
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eXPRESS Polymer Letters 7 (2017) 545-554
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DOI
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https://doi.org/10.3144/expresspolymlett.2017.52
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Tags
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polymer composites fracture toughness modeling and simulation
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