Abstract
Equations for the steady state motion of a crack in a creeping structure are investigated. Although general solutions of these equations are not attempted, it is shown that under certain circumstances particular solutions described by the stress intensity factorK or the stationary creep parameterC* are valid. The crack velocities for which these particular solutions hold are determined. A simple formula for estimatingC* is given. Experimental evidence is examined for its relevance toK-controlled orC*-controlled crack growth.
Résumé
On étudie des équations décrivant le mouvement quasi statique d'une fissure dans une structure en cours de fluage. Même si l'on ne tente pas d'établir des solutions générales pour ces équations, on peut montrer que, sous certaines circonstances, des solutions particulières décrites par le facteur d'intensité de contrainteK ou par le paramètreC de fluage stationaire sont applicables. Les vitesses de fissuration, pour lesquelles ces solutions particulières conviennent, sont déterminées. On fournit une formule simple pour estimerC. Des observations expérimentales sont analysées en ce qui regarde leur relation avec une propagation de fissure sousK contrôlé on sousC contrôlé.
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Ainsworth, R.A. Some observations on creep crack growth. Int J Fract 20, 147–159 (1982). https://doi.org/10.1007/BF01141263
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DOI: https://doi.org/10.1007/BF01141263