Energy-based assessment of ductile tearing in a thin sheet aluminium alloy

This paper deals with several issues in ductile tearing assessment. One of them is the contrasting of energy-based parameters, namely, the Essential Work of Fracture (EWF) [B. Cotterell, J.K. Reddel, The essential work of plane stress ductile fracture, International Journal of Fracture 13 (1977) 267–277], , and the Energy Dissipation Rate (EDR) [C.E. Turner, A re-assessment of ductile tearing resistance (Part I and II). In: Fracture Behaviour and Design of Materials and Structures 1990; Proc. ECF 8; 2: 933–949 and 951–968], R. We intend to answer the following questions: (i) Is there a reasonable correlation between and R? (ii) Is there any correlation between their constituents? and, finally, (iii) Are the energy- and displacement-based characterizations of slant crack growth under uncontained yielding consistent with each other?