Abstract
Mixed mode ductile fractures in thin sheets are shown to be possible. The staggered deep edge notch tension specimen enablesJ p , the plane stress propagation value of theJ integral, and dJ/dα, the rate of increase inJ with crack growth to be measured from the specific work of fracture. TheJ integral can also be separated into its two component modesJ 1 andJ n.
For the particular low alloy steel testedJ p is virtually independent of the mode of fracture, but for other materialsJ p may be dependent on the fracture mode.
Résumé
On montre que des ruptures mixtes de mode ductile dans des feuillards minces sont possibles. En utilisant une éprouvette de traction comportant deux entailles latérales, profondes et décalées, on peut mesurerJ p composante de propagation de l'intégraleJ en état plan de tension et dJ/d a , le taux d'accroissement deJ en fonction de la croissance de la fissure à partir du travail spécifique de rupture. L'intégraleJ peut également être séparée en ses deux composantes des modesJ 1 etJ n.
Dans le cas de l'acier faiblement allié particulier qui a été traité,J p est virtuellement indépendant du mode de rupture; cependant, pour d'autres matériaux,J p peut dépendre du mode de rupture.
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Cotterell, B., Lee, E. & Mai, Y.W. Mixed mode plane stress ductile fracture. Int J Fract 20, 243–250 (1982). https://doi.org/10.1007/BF01130611
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DOI: https://doi.org/10.1007/BF01130611