Publication result detail

Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements

SEITL, S.; MALÍKOVÁ, L.; SOBEK, J.; FRANTÍK, P.; LOPÉZ-CRESPO, P.

Original Title

Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements

English Title

Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements

Type

WoS Article

Original Abstract

A study on the approximation of the stress field in the vicinity of crack tip in a compact tension specimen made from Al 2024-T351 is presented. Crack tip stress tensor components are expressed using the linear elastic fracture mechanics (LEFM) theory in this work, more precisely via its multi-parameter formulation, i.e. by Williams power series (WPS). Determination of coefficients of terms of this series is performed using a least squares-based regression technique known as over deterministic method (ODM) for which displacements data obtained experimentally via optical measurements are taken as inputs. The stress fields reconstructed based on the displacement data obtained experimentally by means of optical measurements are verified by means of the stress field approximations derived for the normalized CT specimen via hybrid elements

English abstract

A study on the approximation of the stress field in the vicinity of crack tip in a compact tension specimen made from Al 2024-T351 is presented. Crack tip stress tensor components are expressed using the linear elastic fracture mechanics (LEFM) theory in this work, more precisely via its multi-parameter formulation, i.e. by Williams power series (WPS). Determination of coefficients of terms of this series is performed using a least squares-based regression technique known as over deterministic method (ODM) for which displacements data obtained experimentally via optical measurements are taken as inputs. The stress fields reconstructed based on the displacement data obtained experimentally by means of optical measurements are verified by means of the stress field approximations derived for the normalized CT specimen via hybrid elements

Keywords

Crack tip fields; Optical measurements; DIC; Williams power series; Higher-order terms; Stress field reconstruction; Multi-parameter approximation

Key words in English

Crack tip fields; Optical measurements; DIC; Williams power series; Higher-order terms; Stress field reconstruction; Multi-parameter approximation

Authors

SEITL, S.; MALÍKOVÁ, L.; SOBEK, J.; FRANTÍK, P.; LOPÉZ-CRESPO, P.

RIV year

2018

Released

01.07.2017

Publisher

Gruppo Italiano Frattura

ISBN

1971-8993

Periodical

Frattura ed Integrita Strutturale-Fracture and Structural Integrity

Volume

11

Number

41

State

Republic of Italy

Pages from

323

Pages to

331

Pages count

9

URL

https://www.fracturae.com/index.php/fis/article/view/IGF-ESIS.41.43

Full text in the Digital Library

http://hdl.handle.net/11012/180638

BibTex

@article{BUT143151,
  author="Stanislav {Seitl} and Lucie {Malíková} and Jakub {Sobek} and Petr {Frantík} and Pablo {Lopéz-Crespo}",
  title="Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements",
  journal="Frattura ed Integrita Strutturale-Fracture and Structural Integrity",
  year="2017",
  volume="11",
  number="41",
  pages="323--331",
  doi="10.3221/IGF-ESIS.41.43",
  url="https://www.fracturae.com/index.php/fis/article/view/IGF-ESIS.41.43"
}

Documents

6659-1-10-20170628