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Aerotecnica Missili & Spazio

, Volume 93, Issue 3–4, pp 93–100 | Cite as

Numerical Validation of a New Energetic Fracture Criterion in Elastic - Plastic Fracture Mechanics for Aluminum Alloys

  • V. Binante
  • A. Frediani
  • L. Lavorini
Article

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.

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Copyright information

© AIDAA Associazione Italiana di Aeronautica e Astronautica 2014

Authors and Affiliations

  • V. Binante
    • 1
  • A. Frediani
    • 2
  • L. Lavorini
  1. 1.Mechanics of Materials and Structures Laboratory via G. MoruzziISTI-CNRPisaItaly
  2. 2.Dipartimento di Ingegneria Aerospaziale “L. Lazzerino” via G. CarusoUniversitá di PisaPisaItaly

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