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Title: Response of fibre metal laminates to blast loading
Author: Shah, Syed Kamran Ayub
ISNI:       0000 0004 2737 7131
Awarding Body: Imperial College London
Current Institution: Imperial College London
Date of Award: 2012
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Fibre-metal laminates (FMLs) are hybrid structures comprising interleaved metal sheets and fibre reinforced polymer composites. In this work the performance of fibre metal laminated plates under blast loading is studied numerically. The FML panels are made of alternating layers of aluminium and glass fibre/polypropylene (GFRP) with different number of layers of aluminium and composite and in the panels with equal number of layers, with different thicknesses of GFPP. The panels are subjected to global blast loading uniformly distributed over the surface of the panel and to local blast loading applied at the centre of the panel with a spatial exponential decay towards the edges. The displacements of the front and back faces are found to increase linearly with increasing impulse. The results for global blast loading are correlated with experimental results obtained by Langdon [doi:10.1016/j.euromechsol.2007.09.003] and for localised blast loading with experimental studies conducted by Langdon [doi:10.1016/j.ijimpeng.2006.05.008 , doi:10.1016/j.ijimpeng.2006.05.009]. A good correlation between the experimental and numerical results is found. Back face debonding is found in all the panels for both load cases. The results are also compared with the response of mild and armour steel plates having the same areal densities as FML panels. It has been shown that for the same impulse, the displacement of mild steel plate with the same areal density is approximately twice the back face displacement of FML for global blast and depends upon the thickness of mild steel plate. Therefore, for global blast loading FML performs better and can withstand higher impulses without rupture whereas mild steel plate tears apart for global blast loading and in certain cases for local blast loading. On the other hand, the displacements in armour steel are 70% to 80% of the corresponding FML panel with same areal density when subjected to global or local blast loading.
Supervisor: Louca, Luke Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral