Publication detail

Analytical approximation of crack-tip stress field: Study on efficient determination of coefficients of higher order terms of Williams power expansion

SOBEK, J. FRANTÍK, P. VESELÝ, V.

Original Title

Analytical approximation of crack-tip stress field: Study on efficient determination of coefficients of higher order terms of Williams power expansion

Type

conference paper

Language

English

Original Abstract

The paper presents a study on accuracy of the multi-parameter approximation of the stress field in a cracked body using Williams power series calibrated according to results of FEM computation. Main attention is paid to a detailed analysis of suitable selection of FE nodes, whose results serve as inputs to the over-deterministic method (ODM) employed for determination of the coefficients of terms of the Williams expansion describing the crack-tip field. Two different ways of FE nodal selection are compared – nodes selected from the crack tip vicinity versus nodes selected from a specific part of the test specimen body in a specific way. Comparison is made with the usage of the authors’ own developed procedures enabling both the determination of the coefficients of the analytical approximation of stress field based on the FE results and the backward reconstruction of the field from those determined terms’ coefficients/functions. The wedge-splitting test (WST) specimen with a crack is taken as example for the study

Keywords

Multi-parameter fracture mechanics, Williams expansion, over-deterministic method

Authors

SOBEK, J.; FRANTÍK, P.; VESELÝ, V.

Released

18. 8. 2016

Publisher

Trans Tech Publications

Location

Switzerland

ISBN

1013-9826

Periodical

Key Engineering Materials (print)

Year of study

713

State

Swiss Confederation

Pages from

207

Pages to

211

Pages count

5

BibTex

@inproceedings{BUT130323,
  author="Jakub {Sobek} and Petr {Frantík} and Václav {Veselý}",
  title="Analytical approximation of crack-tip stress field: Study on efficient determination of coefficients of higher order terms of Williams power expansion",
  booktitle="Advances in Fracture and Damage Mechanics XV",
  year="2016",
  journal="Key Engineering Materials (print)",
  volume="713",
  pages="207--211",
  publisher="Trans Tech Publications",
  address="Switzerland",
  doi="10.4028/www.scientific.net/KEM.713.207",
  issn="1013-9826"
}