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Numerical analysis of brittle materials fractured by sharp indenters

Leonardi, Alessandro, Furgiuele, Franco, Wood, Robert J. K. and Syngellakis, Stravros (2010) Numerical analysis of brittle materials fractured by sharp indenters Engineering Fracture Mechanics, 77, (2), Summer Issue, pp. 264-276. (doi:10.1016/j.engfracmech.2009.08.003).

Record type: Article


Indentation can be used to determine the fracture properties of materials. A detailed investigation
is here presented on the reliability of finite element simulations of sharp indentations on cracked specimens.

Elastic analyses of the stress and deformation fields arising from Vickers, Berkovich and cube-corner indenters generated the stress intensity factor along the edge of penny-shaped or elliptical cracks. Various materials with a range of properties were analysed and the results compared with published experimental data. Additional measurements from tests on soda-lime glass provided further opportunities for experimental validation of numerical predictions.

The variation of the stress intensity factor indicated trends for crack growth patterns, which were consistent with experimental observations. Particular attention was given to the evaluation of the geometry-dependent parameter appearing in the relation yielding the fracture toughness of cracked indented materials. The numerical predictions of this parameter were remarkably consistent with experimental data and results from other approximate methods.

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Published date: January 2010
Keywords: indentation fracture, finite element method, stress intensity factor, sharp indenter, penny-shaped cracks, elliptical cracks


Local EPrints ID: 146367
ISSN: 0013-7944
PURE UUID: 08b92a7d-cbb8-4116-af1f-fc7614fa6c17
ORCID for Robert J. K. Wood: ORCID iD

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Date deposited: 21 Apr 2010 11:59
Last modified: 18 Jul 2017 23:04

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Author: Alessandro Leonardi
Author: Franco Furgiuele
Author: Stravros Syngellakis

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