Abstract The paper deals with numerical studies of two - dimensional quasi static crack growth problems, for elastic - plastic materials with isotropic hardening behaviour. In particular, the FEM analyses regard centre - cracked panel, CCP, specimens, made up of Al2024-T3 alloy, subjected to monotonic increasing load histories, without any constraint about the intensity of the deformation. The main result of these studies is a new fracture criterion, based on the fracture property of the energy momentum tensor; during a quasi static crack propagation, the trace of the energy momentum tensor, evaluated at the current crack tip, attains a value which is independent of the crack length. Based on this property, the proposed fracture criterion is able to describe the crack growth resistance curve of aluminum alloys, in a good agreement with experimental tests.
Numerical Validation of a New Energetic Fracture Criterion in Elastic - Plastic Fracture Mechanics for Aluminum Alloys
Aerotecnica Missili & Spazio ; 93 , 3 ; 93-100
2014-07-01
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Crack Extension Energy Rate and Energetic Approaches in Elastic–Plastic Fracture Mechanics
Springer Verlag | 2012
|