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Application of electrical analog technique in fracture mechanics

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Abstract

An electrical analog technique is described for determining stress intensity factors in the anti-plane shear loading. The experimental procedure consists of either determining electrical potential difference between the clamped ends of a metallic foil as a function of crack length under constant total current or determining the crack surface potential as a function of the crack length along the crack surface. Stress intensity factors have been determined for various crack (or specimen) geometries and are compared with theoretical expressions wherever available. The electrical method described here is extremely rapid and therefore offers an advantage over numerical methods.

Résumé

Une technique d'analogie électrique est décrite en vue de déterminer les facteurs d'intensité de contrainte dans le cas d'une mise en charge par cisaillement antiplanaire. La procédure expérimentale consiste soit à déterminer la différence de potentiel électrique entre les extrémités d'un feuillard métallique fixé, en fonction de la longueur de fissure sous courant total constant, soit à déterminer le potentiel de la surface de fissure en fonction de la longueur de la fissure le long de la surface fissurée. Des facteurs d'intensité de contrainte ont été déterminés pour diverses géométries de fissuration ou d'éprouvettes et ont été comparées avec des expressions théoriques disponibles. La méthode électrique décrite ici est extrêmement rapide et dès lors présente un avantage sur les méthodes numériques.

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Virkar, A.V. Application of electrical analog technique in fracture mechanics. Int J Fract 21, 15–30 (1983). https://doi.org/10.1007/BF01134196

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  • DOI: https://doi.org/10.1007/BF01134196

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