Numerical analysis of brittle materials fractured by sharp indenters
Numerical analysis of brittle materials fractured by sharp indenters
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.
indentation fracture, finite element method, stress intensity factor, sharp indenter, penny-shaped cracks, elliptical cracks
264-276
Leonardi, Alessandro
b4913bce-4ece-4e85-ac3e-552d8d76bc51
Furgiuele, Franco
a2c0d238-1703-4a0a-a1e1-55ba58dd6f52
Wood, Robert J. K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Syngellakis, Stravros
1279f4e2-97ec-44dc-b4c2-28f5ac9c2f88
January 2010
Leonardi, Alessandro
b4913bce-4ece-4e85-ac3e-552d8d76bc51
Furgiuele, Franco
a2c0d238-1703-4a0a-a1e1-55ba58dd6f52
Wood, Robert J. K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Syngellakis, Stravros
1279f4e2-97ec-44dc-b4c2-28f5ac9c2f88
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, .
(doi:10.1016/j.engfracmech.2009.08.003).
Abstract
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
Identifiers
Local EPrints ID: 146367
URI: http://eprints.soton.ac.uk/id/eprint/146367
ISSN: 0013-7944
PURE UUID: 08b92a7d-cbb8-4116-af1f-fc7614fa6c17
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Date deposited: 21 Apr 2010 11:59
Last modified: 14 Mar 2024 02:37
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Contributors
Author:
Alessandro Leonardi
Author:
Franco Furgiuele
Author:
Stravros Syngellakis
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