Abstract
A simple energy balance analysis is presented for the tearing of ductile sheet metals using the trousers test. It is shown that the specific essential work of fracture (w e ) for tearing can be estimated by extrapolating the straight line relationship between the tearing force per unit thickness and the trousers leg width to zero leg width. There are two contributions to the specific essential work of fracture: one is due to the localised plastic shearing work in a zone contiguous with the torn edges (w e1 ) and the other is the final out-of-plane tearing work (w e2 ).
Résumé
En utilisant le “Trousers Test”, on présente une analyse simple d'équilibre énergétique dans le cas du déchirement de feuilles métalliques ductiles. On montre qu'il est possible d'estimer le travail spécifique de rupture en déchirement w e en extrapolant la relation linéaire qui lie la force de déchirement par unité d'épaisseur et la largeur de l'échantillon caractéristique entre une valeur 0 et une valeur donnée. Deux éléments contribuent au travail spécifique essentiel de rupture, l'un est dû au travail de cisaillement plastique local dans une zone contigue aux bords de l'arrachement (w e1 ) et l'autre est le travail de déchirement final hors du plan de la feuille (w e2 ).
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Mai, Y.W., Cotterell, B. The essential work of fracture for tearing of ductile metals. Int J Fract 24, 229–236 (1984). https://doi.org/10.1007/BF00032685
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DOI: https://doi.org/10.1007/BF00032685