English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A quality of multi-parameter approximation of the stress and displacement fields around a crack tip\udin a non-brittle material test specimen is studied in the paper. The stress field approximation using Williams\udpower series is intended to be utilized for estimation of the nonlinear zone extent which potentially plays a role\udwithin methods for determination of true values of fracture parameters of materials exhibiting nonlinear failure.\udConsidering the fact that in the case of elastic-plastic and especially quasi-brittle materials the size of this zone is\udsubstantial in comparison to the specimen dimensions, it is necessary to take a large region around the crack tip\udinto account for this task. An automatic utility created to determine the values of coefficients of the higher\udorder terms of Williams power series by usage of over-deterministic method applied on results of finite element\udanalysis of arbitrary mode I test geometry is one of the tested procedures. The second one provides a backward\udreconstruction of the crack-tip stress field analytically by means of truncated Williams expansion. The\uddeveloped procedures are based on the support of Java programming language and considerably simplify\udanalyses of the mechanical fields’ description in a farther distance from the crack-tip. The presented research is\udfocused on optimization of selection of FE nodal results for improvement of accuracy of the approximation

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