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Competition between brittle fracture and plastic collapse in the failure of thin rectangular panels

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Abstract

A centre-cracked panel of elastic-plastic material of unit thickness is loaded remotely by an uniaxial traction acting along its longitudinal axis. Making use of the Dugdale-Barenblatt model, the size ω of the plastic zones ahead of the crack tips can be obtained by equilibrium considerations. Connected to ω, a generalised elastic-plastic stress intensity factor K is defined which, as ω → 0, approaches the ordinary elastic one. Once the critical values W c or K c at the onset of the unstable propagation of the crack have been specified, the residual-strength curves for plane stress state can be easily deduced. Moreover, conditions are sought for which ductile fracture, brittle fracture or plastic collapse takes place.

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Authors and Affiliations

  1. Istituto di Scienza delle Costruzioni, Università di Pisa, Italy

    A. Bacci

  2. Gruppo d'Insegnamento: Costruzioni e Tecnologie, Accademia Navale, Livorno, Italy

    A. Bacci

  3. Istituto di Scienza delle Costruzioni, Università di Pisa, Italy

    S. Ligarò

Authors
  1. A. Bacci
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  2. S. Ligarò
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Bacci, A., Ligarò, S. Competition between brittle fracture and plastic collapse in the failure of thin rectangular panels. Int J Fract 77, 185–198 (1996). https://doi.org/10.1007/BF00018776

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  • DOI: https://doi.org/10.1007/BF00018776

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