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Accurate Description of Near-Crack-Tip Fields for the Estimation of Inelastic Zone Extent in Quasi-Brittle Materials

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Abstract:

A description of stress and displacement fields by means of the Williams power series using also higher-order terms is the focus of this paper. Coefficients of this series are determined via the over-deterministic method from the results of conventional finite element (FE) analysis. A study is conducted into the selection of the FE node set whose results are processed in this regression technique. Coefficients up to the twelfth term were determined with high precision. The effect of the position of the FE node set on the accuracy of the values of the higher-order term coefficients is reported.

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Periodical:

Key Engineering Materials (Volumes 525-526)

Pages:

529-532

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.525-526.529

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Online since:

November 2012

Authors:

Václav Veselý, Jakub Sobek, Lucie Šestáková, Stanislav Seitl

Keywords:

Crack, Higher-Order Terms, Inelastic Zone, Near-Crack-Tip Fields, Quasi-Brittle Fracture, Williams Series

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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