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On the damage field near crack tips in a filled polymer

Acoustic imaging is applied to delineate the damage field near the tips of extending cracks in an inert-solid propellant

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Abstract

Dynamic-acoustic imaging techniques have been used to delineate, in terms of specific acoustic attenuation, the dewetting damage field near the tips of extending cracks in uniaxially strained thin sheets of an inert-solid rocket-propellant composition. The results show that before crack extension begins, the material damage near the crack tips extends over a large volume of the specimen. From the geometry of the damage field it is deduced that shear strains contribute to the volume dilatation observed near crack tips. The implications of the results for judging the validity of commonly used fracture mechanics models for crack propagation in solid rocket propellants are discussed.

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Authors and Affiliations

  1. Lockheed Palo Alto Research Laboratory, 94304, Palo Alto, CA

    R. H. Martinson (Staff Scientist, Research Scientist and Senior Staff Scientist), J. J. Hartog & G. C. Knollman

Authors
  1. R. H. Martinson
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  2. J. J. Hartog
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  3. G. C. Knollman
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Martinson, R.H., Hartog, J.J. & Knollman, G.C. On the damage field near crack tips in a filled polymer. Experimental Mechanics 22, 329–335 (1982). https://doi.org/10.1007/BF02328535

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  • DOI: https://doi.org/10.1007/BF02328535

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