Blunt V-Notch Brittle Fracture: An Improved Finite Fracture Mechanics Approach

Abstract:

The coupled Finite Fracture Mechanics (FFM) criterion is applied to investigate brittle fracture in rounded V-notched samples under mode I loading. The approach is based on the contemporaneous fulfilment of a stress requirement and the energy balance, the latter being implemented on the basis of a recently proposed analytical expression for the stress intensity factor. Results are presented in terms of the critical crack advance and the apparent generalized fracture toughness, i.e. the unknowns related to the system of two equations describing the FFM criterion. A validation of the theory is performed by employing varying root radius notched, as-quenched, AISI 4340 steel specimens fracture results.

• Periodical: Advanced Materials Research (Volume 1105)
• Pages: 237-244
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1105.237
• Online since: May 2015
• Authors: Alberto Sapora*, Pietro Cornetti, Alberto Carpinteri, Donato Firrao
• Keywords: AISI 4340 Steel, As Quenched Steel, Blunt V-Notches, Brittle Fracture, Finite Fracture Mechanics

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