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A numerical investigation on the geometry dependence of the crack growth resistance in CT specimens

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Abstract

The influence of the specimen thickness B and the ligament length b on the J R -curves is numerically investigated for CT specimens. The thickness effect is taken into account with 2-D analyses by dividing a plain sided specimen into a plane stress part and a plane strain part. The fracture process is controlled by experimentally determined critical values of the crack tip opening displacement for crack growth initiation (CTODi) and the crack tip opening angle for stable crack growth (CTOAC). It is shown that for the global behaviour of a plain sided specimen, the B/b ratio is essential. The difference between the geometry dependence of the initiation value of the J-integral and the geometry dependence of the slope of the J R -curves is also shown.

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Authors and Affiliations

  1. Christian-Doppler-Laboratorium für Mikromechanik der Werkstoffe, A-8700, Leoben, Austria

    G. X. Shan

  2. Erich-Schmid-Institut für Festkörperphysik der Österreichischen Akademie der Wissenschaften, A-8700, Leoben, Austria

    O. Kolednik

  3. Institut für Mechanik, Montanuniversität Leoben, A-8700, Leoben, Austria

    F. D. Fischer

  4. Christian-Doppler-Laboratorium für Mikromechanik der Werkstoffe, A--8700, Leoben, Austria

    F. D. Fischer

Authors
  1. G. X. Shan
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  2. O. Kolednik
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  3. F. D. Fischer
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Shan, G.X., Kolednik, O. & Fischer, F.D. A numerical investigation on the geometry dependence of the crack growth resistance in CT specimens. Int J Fract 66, 173–187 (1994). https://doi.org/10.1007/BF00020082

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  • DOI: https://doi.org/10.1007/BF00020082

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