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 segments ahead of the crack tips is obtained by equilibrium considerations. Connected to ω, a generalised elastic-plastic stress intensity factor K is subsequently defined which, as ω→0, approaches the ordinary elastic one. Once the critical values ωc or Kc 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.

Competition between Brittle Fracture and Plastic Collapse in the Failure of Thin Rectangular Panels

LIGARO', SALVATORE SERGIO
1996-01-01

Abstract

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 segments ahead of the crack tips is obtained by equilibrium considerations. Connected to ω, a generalised elastic-plastic stress intensity factor K is subsequently defined which, as ω→0, approaches the ordinary elastic one. Once the critical values ωc or Kc 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.
Bacci, A; Ligaro', SALVATORE SERGIO
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/48214
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