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Temperature effects in the fracture of PMMA

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Abstract

Experiments are described in which the fracture toughness,K c, of PMMA has been determined in the temperature range −190 to + 80° C and over the crack speed range of 10−2 to 102 mm sec−1. Single edge notch tension was used for instability measurements but the other data were obtained using the double torsion method. In the range −80 to + 80°C the variations inK c may be described in terms of modulus changes and a constant crack opening displacement criterion. Crack instabilities are correlated with isothermal-adiabatic transitions at the crack tip. Below −80° C there is an inverted rate dependence associated with thermal effects during post-instability crack propagation.

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Author notes

  1. G. P. Marshall

    Present address: KC Research Limited, Cedar House, Wycombe Road, Prestwood, Bucks

Authors and Affiliations

  1. Mechanical Engineering Department, Imperial College, London, UK

    G. P. Marshall, L. H. Coutts & J. G. Williams

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  1. G. P. Marshall
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  2. L. H. Coutts
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  3. J. G. Williams
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Marshall, G.P., Coutts, L.H. & Williams, J.G. Temperature effects in the fracture of PMMA. J Mater Sci 9, 1409–1419 (1974). https://doi.org/10.1007/BF00552926

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  • DOI: https://doi.org/10.1007/BF00552926

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