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The effect of damage on the impact resistance of composite materials

Edwards, Cerise, Helliker, M, James, BD, Jesson, David, Livesey, RL, Ogin, Stephen and Oldfield, Matthew (2018) The effect of damage on the impact resistance of composite materials In: ECCM18 - 18th European Conference on Composite Materials, 24 - 28 June 2018, Athens, Greece.

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Abstract

Armour which is manufactured and distributed for personnel, vehicle and structural protection, primarily for military or policing applications, undergoes stringent testing to ensure that it can meet the demands of a range of impact scenarios. However, the effects of repetitive low-level damage are not fully understood and, in order to maintain a given level of protection, armour is recalled and replaced periodically, which is costly, and may be unnecessary. This paper reports preliminary studies on the relationship between minor damage and the resulting impact resistance of a woven fabric reinforced composite laminate (E-glass with epoxy resin). Specimens were subjected to displacement-controlled fatigue tests to introduce dispersed damage before being subjected to quasi-static indentation testing. The results showed that during penetration of the specimens, the peak load was reduced by approximately 10% for the pre-fatigued specimens, compared to the non-fatigued specimens, and there was some indication the energy absorption also reduced. It is proposed that the development of fibre fractures during the pre-fatigue of the specimens is the origin of these changes.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Edwards, Cerisec.a.edwards@surrey.ac.uk
Helliker, M
James, BD
Jesson, DavidD.Jesson@surrey.ac.uk
Livesey, RL
Ogin, StephenS.Ogin@surrey.ac.uk
Oldfield, Matthewm.oldfield@surrey.ac.uk
Date : 2018
Uncontrolled Keywords : armour, damage, fatigue, GFRP, impact resistance
Depositing User : Melanie Hughes
Date Deposited : 18 Jul 2018 15:24
Last Modified : 18 Jul 2018 15:24
URI: http://epubs.surrey.ac.uk/id/eprint/848745

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