THE EFFECT OF SUPPORT PLATE ON DRILLING-INDUCED DELAMINATION
Delamination is considered as a major problem in drilling of composite materials, which degrades the mechanical properties of these materials. The thrust force exerted by the drill is considered as the major cause of delamination; and one practical approach to reduce delamination is to use a back-up...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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CTU Central Library
2016-02-01
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| Series: | Acta Polytechnica CTU Proceedings |
| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/3233 |
| _version_ | 1818307864116068352 |
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| author | Navid Zarif Karimi Hossein Heidary Parnian Kianfar Mahmud Hasani Giangiacomo Minak |
| author_facet | Navid Zarif Karimi Hossein Heidary Parnian Kianfar Mahmud Hasani Giangiacomo Minak |
| author_sort | Navid Zarif Karimi |
| collection | DOAJ |
| description | Delamination is considered as a major problem in drilling of composite materials, which degrades the mechanical properties of these materials. The thrust force exerted by the drill is considered as the major cause of delamination; and one practical approach to reduce delamination is to use a back-up plate under the specimen. In this paper, the effect of exit support plate on delamination in twist drilling of glass fiber reinforced composites is studied. Firstly, two analytical models based on linear fracture mechanics and elastic bending theory of plates are described to find critical thrust forces at the beginning of crack growth for drilling with and without back-up plate. Secondly, two series of experiments are carried out on glass fiber reinforced composites to determine quantitatively the effect of drilling parameters on the amount of delamination. Experimental findings verify a large reduction in the amount of delaminated area when a back-up plate is placed under the specimen. |
| first_indexed | 2024-12-13T07:05:09Z |
| format | Article |
| id | doaj.art-059f38b9bf484f5ab7bd19d17e373c70 |
| institution | Directory Open Access Journal |
| issn | 2336-5382 |
| language | English |
| last_indexed | 2024-12-13T07:05:09Z |
| publishDate | 2016-02-01 |
| publisher | CTU Central Library |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj.art-059f38b9bf484f5ab7bd19d17e373c702022-12-21T23:55:49ZengCTU Central LibraryActa Polytechnica CTU Proceedings2336-53822016-02-0130192410.14311/APP.2016.3.00192917THE EFFECT OF SUPPORT PLATE ON DRILLING-INDUCED DELAMINATIONNavid Zarif Karimi0Hossein Heidary1Parnian Kianfar2Mahmud Hasani3Giangiacomo Minak4University of Bologna, Via Fontanelle 40, Forli, ItalyUniversity of Tafresh, Tehran Road 1, Tafresh, IranAmirkabir University of Technology, Hafez 424, Tehran, IranAmirkabir University of Technology, Hafez 424, Tehran, IranUniversity of Bologna, Via Fontanelle 40, Forli, ItalyDelamination is considered as a major problem in drilling of composite materials, which degrades the mechanical properties of these materials. The thrust force exerted by the drill is considered as the major cause of delamination; and one practical approach to reduce delamination is to use a back-up plate under the specimen. In this paper, the effect of exit support plate on delamination in twist drilling of glass fiber reinforced composites is studied. Firstly, two analytical models based on linear fracture mechanics and elastic bending theory of plates are described to find critical thrust forces at the beginning of crack growth for drilling with and without back-up plate. Secondly, two series of experiments are carried out on glass fiber reinforced composites to determine quantitatively the effect of drilling parameters on the amount of delamination. Experimental findings verify a large reduction in the amount of delaminated area when a back-up plate is placed under the specimen.https://ojs.cvut.cz/ojs/index.php/APP/article/view/3233 |
| spellingShingle | Navid Zarif Karimi Hossein Heidary Parnian Kianfar Mahmud Hasani Giangiacomo Minak THE EFFECT OF SUPPORT PLATE ON DRILLING-INDUCED DELAMINATION Acta Polytechnica CTU Proceedings |
| title | THE EFFECT OF SUPPORT PLATE ON DRILLING-INDUCED DELAMINATION |
| title_full | THE EFFECT OF SUPPORT PLATE ON DRILLING-INDUCED DELAMINATION |
| title_fullStr | THE EFFECT OF SUPPORT PLATE ON DRILLING-INDUCED DELAMINATION |
| title_full_unstemmed | THE EFFECT OF SUPPORT PLATE ON DRILLING-INDUCED DELAMINATION |
| title_short | THE EFFECT OF SUPPORT PLATE ON DRILLING-INDUCED DELAMINATION |
| title_sort | effect of support plate on drilling induced delamination |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/3233 |
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