An elliptical fracture criterion for mixed mode fracture I+II emanating from notches

H. El Minor , G. Pluvinage , Z. Azari

Abstract

Some mixed mode fracture criterion may be converted in to elliptical or ellipsoidal formula with the aid of mathematical translation. Hence, the crack initiation in mixed mode fracture I+II emanating from notches, has been studied using notched circular ring specimens. On the basis of Irwin (1957) theory, a new criteria in mixed mode fracture I+II, based fracture elliptic criterion and notch stress intensity factors has been developed.

Key Words

notch effect; angled crack problem; maximum tangential stress criterion; effective tangential stress; effective tangential distance; relative tangential stress gradient; weight function; notch stress intensity factors KI? and KII?.

Address

H. El Minor — Laboratoire d?Energie, Ressources Naturelles et Modelisation, Faculte Polydisciplinaire de Taza_Universite Sidi Mohemed Ben Abdelah Fes, MoroccoG. Pluvinage: Universite de Metz, Laboratoire de Fiabilite Mecanique, Ile du Saulcy Metz 57045, FranceZ. Azari: Universite de Picardie Jules Verne, Faculte de Mathematiques et d\'Informatique, 33 rue Saint-Leu, 80039 Amiens, France

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