Počet záznamů: 1

Multi-parameter approximation of stress field in a cracked specimen using purpose-built Java applications

SYSNO ASEP	0454606
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Multi-parameter approximation of stress field in a cracked specimen using purpose-built Java applications
Tvůrce(i)	Veselý, V. (CZ) Sopek, J. (CZ) Tesař, D. (CZ) Frantík, P. (CZ) Pail, T. (CZ) Seitl, Stanislav (UFM-A)_{RID, ORCID}
Celkový počet autorů	6
Zdroj.dok.	Frattura ed Integrita Strutturale. - : Gruppo Italiano Frattura - ISSN 1971-8993 Roč. 9, č. 33 (2015), s. 120-133
Poč.str.	14 s.
Jazyk dok.	eng - angličtina
Země vyd.	IT - Itálie
Klíč. slova	Cracked specimen ; Near-crack-tip fields ; Williams expansion ; Higher order terms ; Stress field reconstruction ; Finite element analysis ; Java application
Vědní obor RIV	JL - Únava materiálu a lomová mechanika
Institucionální podpora	UFM-A - RVO:68081723
UT WOS	000385314100016
EID SCOPUS	84934280377
DOI	10.3221/IGF-ESIS.33.16
Anotace	A quality of multi-parameter approximation of the stress and displacement fields around a crack tip in a non-brittle material test specimen is studied in the paper. The stress field approximation using Williams power series is intended to be utilized for estimation of the nonlinear zone extent which potentially plays a role within methods for determination of true values of fracture parameters of materials exhibiting nonlinear failure. Considering the fact that in the case of elastic-plastic and especially quasi-brittle materials the size of this zone is substantial in comparison to the specimen dimensions, it is necessary to take a large region around the crack tip into account for this task. An automatic utility created to determine the values of coefficients of the higher order terms of Williams power series by usage of over-deterministic method applied on results of finite element analysis of arbitrary mode I test geometry is one of the tested procedures. The second one provides a backward reconstruction of the crack-tip stress field analytically by means of truncated Williams expansion. The developed procedures are based on the support of Java programming language and considerably simplify analyses of the mechanical fields’ description in a farther distance from the crack-tip. The presented research is focused on optimization of selection of FE nodal results for improvement of accuracy of the approximation.
Pracoviště	Ústav fyziky materiálu
Kontakt	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Rok sběru	2016

Počet záznamů: 1