Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements
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-param...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2017-06-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://212.237.37.202/index.php/fis/article/view/1898 |
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| author | S. Seitl L. Malíkova J. Sobek P. Frantík P. Lopez-Crespo |
| author_facet | S. Seitl L. Malíkova J. Sobek P. Frantík P. Lopez-Crespo |
| author_sort | S. Seitl |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-a4a9054c67ed4227a8e242616c99a3ad |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2017-06-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-a4a9054c67ed4227a8e242616c99a3ad2025-01-03T01:05:20ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932017-06-011141Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurementsS. SeitlL. MalíkovaJ. SobekP. FrantíkP. Lopez-CrespoA 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.https://212.237.37.202/index.php/fis/article/view/1898Crack tip fieldsOptical measurementsDICWilliams power seriesHigher-order termsStress field reconstruction |
| spellingShingle | S. Seitl L. Malíkova J. Sobek P. Frantík P. Lopez-Crespo Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements Fracture and Structural Integrity Crack tip fields Optical measurements DIC Williams power series Higher-order terms Stress field reconstruction |
| title | Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements |
| title_full | Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements |
| title_fullStr | Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements |
| title_full_unstemmed | Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements |
| title_short | Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements |
| title_sort | williams expansion based approximation of the stress field in an al 2024 body with a crack from optical measurements |
| topic | Crack tip fields Optical measurements DIC Williams power series Higher-order terms Stress field reconstruction |
| url | https://212.237.37.202/index.php/fis/article/view/1898 |
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