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Damage generated in carbon/epoxy composite plates with holes under different levels of impact energy

Luo, RK; Wu, WX; Gahagan, PGP; Mortel, WJ; (2000) Damage generated in carbon/epoxy composite plates with holes under different levels of impact energy. Structures and Materials , 6 191 - 200.

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Abstract

Many research efforts have been made in the impact evaluation of composite structures without holes or cut-outs. In engineering design and applications it is inevitable to have such lack of continuity in composite structures. The work reported here investigates the damage induced in carbon/epoxy composite plates with holes under 0.44 J and 0.59 J impact. Both the simulation and the experiment show that there is only one matrix crack between the impact point and the holes under 0.44 J impact whereas there are two parallel matrix cracks under 0.59 J impact. From simulation of 0.44 J impact the crack initiates at impact point and propagates towards the holes. From simulation of 0.59 J impact one crack (originating crack) initiates at the point of impact and propagates towards the hole whereas the other crack (rebounding crack) initiates near the hole edge and propagates towards the impact centre. Delamination comparison is also included. It is shown that the damage prediction can be carried out under this sophisticated situation to make design assessment on these structures with more confidence.

Type:Article
Title:Damage generated in carbon/epoxy composite plates with holes under different levels of impact energy
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Civil, Environmental and Geomatic Engineering

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