Crack propagation in a brittle DCB specimen assessed by means of the Williams� power expansion
A double cantilever beam geometry has been chosen in order to investigate the importance of the higher-order terms of the Williams power expansion for the crack path estimation. The crack propagation has been tested experimentally on a brittle polymethylmethacrylate (PMMA) specimen and although the...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2019-04-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2292/2350 |
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| author | Lucie Malkov� Seyed Mohammad Javad Razavi Filippo Berto |
| author_facet | Lucie Malkov� Seyed Mohammad Javad Razavi Filippo Berto |
| author_sort | Lucie Malkov� |
| collection | DOAJ |
| description | A double cantilever beam geometry has been chosen in order to investigate the importance of the higher-order terms of the Williams power expansion for the crack path estimation. The crack propagation has been tested experimentally on a brittle polymethylmethacrylate (PMMA) specimen and although the mode I loading conditions were applied, the crack kinked from its original plane immediately and propagated towards the bottom side of the specimen. It has been shown that this phenomenon is connected to the magnitude and sign of the T-stress and to the level of the constraint generally. In this work, the influence of the third and higher terms of the Williamsᒒ series on the crack propagation is investigated. The generalized form of the well-known maximum tangential stress fracture criterion for determination of the crack propagation angle has been tested and discussed. The observed differences in the crack trajectory of different specimens have been found to be related to the magnitude of the higher-order terms of the stress tensor components at the crack tip. |
| format | Article |
| id | doaj-art-9da61620759e4c75b1d651ce6ba00471 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2019-04-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-9da61620759e4c75b1d651ce6ba004712025-02-03T10:31:53ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932019-04-011348344110.3221/IGF-ESIS.48.0510.3221/IGF-ESIS.48.05Crack propagation in a brittle DCB specimen assessed by means of the Williams� power expansionLucie Malkov�Seyed Mohammad Javad RazaviFilippo BertoA double cantilever beam geometry has been chosen in order to investigate the importance of the higher-order terms of the Williams power expansion for the crack path estimation. The crack propagation has been tested experimentally on a brittle polymethylmethacrylate (PMMA) specimen and although the mode I loading conditions were applied, the crack kinked from its original plane immediately and propagated towards the bottom side of the specimen. It has been shown that this phenomenon is connected to the magnitude and sign of the T-stress and to the level of the constraint generally. In this work, the influence of the third and higher terms of the Williamsᒒ series on the crack propagation is investigated. The generalized form of the well-known maximum tangential stress fracture criterion for determination of the crack propagation angle has been tested and discussed. The observed differences in the crack trajectory of different specimens have been found to be related to the magnitude of the higher-order terms of the stress tensor components at the crack tip.https://www.fracturae.com/index.php/fis/article/view/2292/2350Crack deflectionDCB specimenGeneralized MTS criterionGeometry effectWilliams� power expansion |
| spellingShingle | Lucie Malkov� Seyed Mohammad Javad Razavi Filippo Berto Crack propagation in a brittle DCB specimen assessed by means of the Williams� power expansion Fracture and Structural Integrity Crack deflection DCB specimen Generalized MTS criterion Geometry effect Williams� power expansion |
| title | Crack propagation in a brittle DCB specimen assessed by means of the Williams� power expansion |
| title_full | Crack propagation in a brittle DCB specimen assessed by means of the Williams� power expansion |
| title_fullStr | Crack propagation in a brittle DCB specimen assessed by means of the Williams� power expansion |
| title_full_unstemmed | Crack propagation in a brittle DCB specimen assessed by means of the Williams� power expansion |
| title_short | Crack propagation in a brittle DCB specimen assessed by means of the Williams� power expansion |
| title_sort | crack propagation in a brittle dcb specimen assessed by means of the williams� power expansion |
| topic | Crack deflection DCB specimen Generalized MTS criterion Geometry effect Williams� power expansion |
| url | https://www.fracturae.com/index.php/fis/article/view/2292/2350 |
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