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The use of a controlled multiple impact test to characterise through-thickness penetration of composite panels

Ogin, SL, Sirichantra, J and Jesson, DA (2010) The use of a controlled multiple impact test to characterise through-thickness penetration of composite panels In: 14TH EUROPEAN CONFERENCE ON COMPOSITE MATERIALS, 2010-06-07 - 2010-06-10, Budapest, Hungary.

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Abstract

During the impact of thin composite panels, well-defined flaps can develop on the exit face as a consequence of through-thickness penetration of the panel. For certain materials (for example, CFRP panels based on plies of plain-woven fabric) the flaps develop as four triangles, with the apex of each triangle at the point of impact. As the impactor is driven through the panel, the flap (i.e. crack) lengths increase, until complete penetration of the panel by the impactor occurs. In the experiments described within this paper, CFRP panels fabricated from epoxy resin reinforced with plain-woven carbon fibre fabrics have been impacted using controlled multiple impact tests. During these tests, the impactor is driven at a controlled velocity to a particular depth of penetration through the composite panel, withdrawn, and then driven further through the panel subsequently. The experimental results show that the dependence of the flap compliance is proportional to the square of the flap length, which is in agreement with theoretical predictions. This compliance/crack-length also enables a toughness value for the composite panel to be derived that is directly relevant to through-thickness impact. The relationship of this toughness value to measurements of the mode I toughness of the composite panel using single edge notch specimens is also discussed.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Ogin, SLUNSPECIFIEDUNSPECIFIED
Sirichantra, JUNSPECIFIEDUNSPECIFIED
Jesson, DAUNSPECIFIEDUNSPECIFIED
Date : 7 June 2010
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 14:12
Last Modified : 28 Mar 2017 14:12
URI: http://epubs.surrey.ac.uk/id/eprint/737192

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