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Mixed Mode Fracture of Cracks and Wedge Shaped Notches in Expanded PVC Foam

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Abstract

Fracture initiated from a sharp crack or wedge shaped notch in a homogeneous material, subjected to different loading is considered. Singularities in the stress fields at edges and vertices are discussed. A point-stress criterion is used to predict fracture for sharp cracks as well as 90° wedge notches in expanded PVC foam. The point-stress criterion is formulated in a manner allowing failure predictions in general 3D stress situations. The influence of nonsingular T-stress at cracks is discussed and substantiated by experimental results.

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Authors and Affiliations

  1. Department of Aeronautics, Division of Lightweight Structures, Kungliga Tekniska Högskolan (Royal Institute of Technology), S-100 44, Stockholm, Sweden

    S. Hallström & J.L. Grenestedt

Authors
  1. S. Hallström
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  2. J.L. Grenestedt
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Hallström, S., Grenestedt, J. Mixed Mode Fracture of Cracks and Wedge Shaped Notches in Expanded PVC Foam. International Journal of Fracture 88, 343–358 (1997). https://doi.org/10.1023/A:1007439409625

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  • DOI: https://doi.org/10.1023/A:1007439409625

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