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On the uniqueness of the stress intensity factor — crack velocity relationship

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Abstract

Experimental results due to several different investigators on the K I − a relationship are reviewed and the apparent differences in results leading to questions regarding the uniqueness of this relationship are discussed. The influence of the errors due to the three dimensional state of stress at the crack tip, the effects of non-singular stresses, velocity, transient loading and velocity measurement is presented. These errors have obscured resolution of the uniqueness question and an experiment is described to resolve the issue.

Résumé

On passe en revue les résultats expérimentaux obtenus par différents chercheurs sur la relation K I − a et l'on discute des différences apparentes dans les résultats qui conduisent à des questions en ce qui regarde l'unicité de cette relation. On présente l'influence des erreurs dues à l'état tridimensionnel des tensions à l'extrémité de la fissure, les effets des contraintes non singulières de la vitesse de la mise en charge transitoire et de la mesure de la vitesse. Ces erreurs ne contribuent pas à éclaircir la question de l'unicité et, en vue de la résoudre, on décrit une expérience possible.

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Authors and Affiliations

  1. Photomechanics Laboratory, Department of Mechanical Engineering, University of Maryland, 20742, College Park, MD, USA

    J. W. Dally, W. L. Fourney & G. R. Irwin

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  1. J. W. Dally
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  2. W. L. Fourney
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  3. G. R. Irwin
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Dally, J.W., Fourney, W.L. & Irwin, G.R. On the uniqueness of the stress intensity factor — crack velocity relationship. Int J Fract 27, 159–168 (1985). https://doi.org/10.1007/BF00017965

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  • DOI: https://doi.org/10.1007/BF00017965

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