Original title: INFLUENCE OF BOUNDARY CONDITIONS ON HIGHER ORDER TERMS OF NEAR-CRACK-TIP STRESS FIELD IN A WST SPECIMEN
Authors: Veselý, V. ; Šestáková, L. ; Seitl, Stanislav
Document type: Papers
Conference/Event: International Conference on Fracture and Damage Mechanics - FDM 2011 /10./, Dubrovník (HR), 2011-09-19 / 2011-09-21
Year: 2011
Language: eng
Series: Key Engineering Materials
Abstract: A precise description of the stress and deformation fields in a cracked body is provided using multi-parameter fracture mechanics based on the approximation of the fields by means of the Williams' power series. This paper presents a detailed analysis of the stress field in a wedge-splitting test geometry specimen aimed at the calculation of coefficients of the higher order terms (up to 14) of the Williams' expansion. The numerical study is conducted with the use of a conventional finite element package; however, for processing of the results an over-deterministic method is employed. Special attention is paid to the influence of boundary conditions of the test geometry on the values of the coefficients of the higher order terms of the Williams' series. The results are compared to data from the literature; a strong effect of the boundary conditions is observed.
Keywords: asymptotic field; boundary conditions; coefficients; concrete; crack tip fields; fracture energy; higher order terms; over-deterministic method; wedge-splitting test
Project no.: GAP105/11/1551 (CEP), CEZ:AV0Z20410507 (CEP)
Funding provider: GA ČR
Host item entry: ADVANCES IN FRACTURE AND DAMAGE MECHANICS X, ISBN 978-3-0378-5218-7, ISSN 1013-9826

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0279842

Permalink: http://www.nusl.cz/ntk/nusl-373431


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