Multi-parameter approximation of the stress field in a cracked body in the more distant surroundings of the crack tip

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F16%3A00464682" target="_blank" >RIV/68081723:_____/16:00464682 - isvavai.cz</a>

Alternative codes found

RIV/00216305:26110/16:PU121319

Result on the web

<a href="http://dx.doi.org/10.1016/j.ijfatigue.2016.02.016" target="_blank" >http://dx.doi.org/10.1016/j.ijfatigue.2016.02.016</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijfatigue.2016.02.016" target="_blank" >10.1016/j.ijfatigue.2016.02.016</a>

Result language

angličtina

Original language name

Multi-parameter approximation of the stress field in a cracked body in the more distant surroundings of the crack tip

Original language description

The accuracy of the multi-parameter approximation of the stress fields in a cracked body is studied in the paper. This approximation, which uses the Williams power series expansion (WE), is intended to be used to estimate the extent of the nonlinear zone, which plays a significant role within tensile failure and the fatigue assessment of non-brittle materials. The characteristics of this zone could be potentially incorporated into methods of determining the true values of fracture parameters and the fatigue behaviour descriptors 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 specimen dimensions, it is necessary to consider a large region around the crack tip for this task. An automatic routine implemented as a Java application was created to determine the values of coefficients of the higher order terms of the WE that describe crack-tip fields. These values are calculated using the Over Deterministic Method (ODM), which is applied to the results of the finite element (FE) analysis of an arbitrary mode I test geometry. Furthermore, another Java application developed by the authors provides an analytical reconstruction of the crack-tip stress field by means of the truncated WE, and enables detailed analysis of the crack-tip stress field approximation. The developed procedures simplify the analysis of the description of mechanical fields at a greater distance from the crack tip considerably. The presented research is focused on the optimisation of the selection of FE nodal results entering the ODM procedure used to determine the values of coefficients of the higher order terms of the WE. The aim is to improve the accuracy of the approximation. (C) 2016 Elsevier Ltd. All rights reserved.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JL - Fatigue and fracture mechanics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Journal of Fatigue

ISSN

0142-1123

e-ISSN

—

Volume of the periodical

89

Issue of the periodical within the volume

AUG

Country of publishing house

GB - UNITED KINGDOM

Number of pages

36

Pages from-to

20-35

UT code for WoS article

000377839100004

EID of the result in the Scopus database

2-s2.0-84959133579