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Application of the crack-bridging model for fracture resistance (R-curve behaviour) to PMMA

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Abstract

The rising fracture toughness behaviour of PMMA was characterized using a crack-bridging model originally developed for coarse-grained alumina that predicts a mechanism for crack resistance from the bridging of unbroken grains behind the crack tip. Based on the published experimental observation of PMMA, the craze zone behind the crack tip was thought to be analogous to the effective grain-bridging zone in the model in which the fibrils in the craze zone were related to the restraining interfacial ligaments. Self-consistent results in terms of the model were obtained which indicates that the crack-bridging model can be used to account for the fibril-toughening mechanism in PMMA.

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Authors and Affiliations

  1. Mechanical Engineering Department, University of Massachusetts, 01003, Amherst, Massachusetts, USA

    J. E. Ritter & M. R. Lin

  2. Civil Engineering Department, University of Massachusetts, 01003, Amherst, Massachusetts, USA

    T. J. Lardner

Authors
  1. J. E. Ritter
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  2. M. R. Lin
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  3. T. J. Lardner
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Ritter, J.E., Lin, M.R. & Lardner, T.J. Application of the crack-bridging model for fracture resistance (R-curve behaviour) to PMMA. J Mater Sci 24, 339–342 (1989). https://doi.org/10.1007/BF00660977

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  • DOI: https://doi.org/10.1007/BF00660977

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