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Analytical approaches to stress intensity factor evaluation for indentation cracks

Analytical approaches to stress intensity factor evaluation for indentation cracks
Analytical approaches to stress intensity factor evaluation for indentation cracks
In the present paper, an analytical solution for the stress intensity factor in the case of cracks produced by Vickers indenters has been extended to the cases of triangular indenters, i.e., Berkovich and cube-corner. According to the adopted approach, median/radial cracks produced by indentations are modeled as loaded by either a point-force or a symmetric disk-shaped wedge. The wedge diameter is assumed to be equal to the plastic zone size whereas the wedge thickness is evaluated by comparing the wedge volume with the hardness-impression volume. The point-force and the disk-shaped wedge analyses produce an upper and a lower bound, respectively, of the geometry-dependent parameter appearing in the expression for the fracture toughness. The predictions of the present analysis are in good agreement with similar experimental and numerical results.
0002-7820
1093-1097
Leonardi, Alessandro
b4913bce-4ece-4e85-ac3e-552d8d76bc51
Furgiuele, Franco
a2c0d238-1703-4a0a-a1e1-55ba58dd6f52
Syngellakis, Stavros
1279f4e2-97ec-44dc-b4c2-28f5ac9c2f88
Wood, Robert J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Leonardi, Alessandro
b4913bce-4ece-4e85-ac3e-552d8d76bc51
Furgiuele, Franco
a2c0d238-1703-4a0a-a1e1-55ba58dd6f52
Syngellakis, Stavros
1279f4e2-97ec-44dc-b4c2-28f5ac9c2f88
Wood, Robert J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73

Leonardi, Alessandro, Furgiuele, Franco, Syngellakis, Stavros and Wood, Robert J.K. (2009) Analytical approaches to stress intensity factor evaluation for indentation cracks. Journal of the American Ceramic Society, 92 (5), 1093-1097. (doi:10.1111/j.1551-2916.2009.03070.x).

Record type: Article

Abstract

In the present paper, an analytical solution for the stress intensity factor in the case of cracks produced by Vickers indenters has been extended to the cases of triangular indenters, i.e., Berkovich and cube-corner. According to the adopted approach, median/radial cracks produced by indentations are modeled as loaded by either a point-force or a symmetric disk-shaped wedge. The wedge diameter is assumed to be equal to the plastic zone size whereas the wedge thickness is evaluated by comparing the wedge volume with the hardness-impression volume. The point-force and the disk-shaped wedge analyses produce an upper and a lower bound, respectively, of the geometry-dependent parameter appearing in the expression for the fracture toughness. The predictions of the present analysis are in good agreement with similar experimental and numerical results.

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Published date: May 2009

Identifiers

Local EPrints ID: 66658
URI: http://eprints.soton.ac.uk/id/eprint/66658
ISSN: 0002-7820
PURE UUID: 1fbc556c-daf6-4d32-9fbe-024303db1a61
ORCID for Robert J.K. Wood: ORCID iD orcid.org/0000-0003-0681-9239

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Date deposited: 07 Jul 2009
Last modified: 14 Mar 2024 02:37

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Contributors

Author: Alessandro Leonardi
Author: Franco Furgiuele
Author: Stavros Syngellakis

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