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Consideration of the mechanical behaviour of small fatigue cracks

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Abstract

The mechanical behaviour of small fatigue cracks is investigated for a low, medium and high strength material. At first an elastic consideration is performed which give a good impression how the stress fields change with crack size. In part 2 a full elastic-plastic analysis of short cracks is performed using a new numerical scheme to simulate the growth of shear bands emanating from the crack tip. The influence of material and loading paramters as well as of the crack size on the plastic crack tip opening displacement is discussed. It is also investigated how it is possible to get a conservative estimate of the crack tip deformation at small cracks.

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Authors and Affiliations

  1. Hilti AG, FL-9494, Schaan, Liechtenstein

    Franz O. Riemelmoser

  2. Christian-Doppler Laboratory for Local Analysis of Deformation and Fracture, Erich-Schmid-Institute of Material Science of the Austrian Academy of Sciences and, A-8700, Leoben, Austria

    Reinhard Pippan

Authors
  1. Franz O. Riemelmoser
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  2. Reinhard Pippan
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Riemelmoser, F.O., Pippan, R. Consideration of the mechanical behaviour of small fatigue cracks. International Journal of Fracture 118, 251–270 (2002). https://doi.org/10.1023/A:1022928722764

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