Numerical Study Of Blast Mitigation Performance Of TSP Foldcore Sandwich Structure

Accidental explosions and terrorist activities are likely to cause harm to buildings and personnel.Sandwich structures are applied as an energy absorber and cladding to mitigate blast load,due to their lightweight,high strength to weight ratio,and good blast-resisting/mitigating performance.Different topologies and materials of the cores have been extensively investigated.However,conventional sandwich structures have an inconsistent crushing behavior with a high initial peak crushing resistance and large fluctuation under dynamic loading.In recent decades,the origami and kirigami foldcore have been investigated extensively and introduced to the sandwich structure due to its advantages.In this thesis,in order to evaluate the blast mitigation capacities and protective performance of TSP foldcore sandwich structures,the numerical study of sacrificial cladding with TSP foldcore under air blast load is investigated.A set of metal mould is designed to achieve the mass production of TSP foldcore.A modular aluminium supporting plate is then designed and fabricated.To select reusable and economic supporting plate,a large number of quasi-static compression experiments and numerical model validation are carried out.The blast mitigation capacities and protective performance of sacrificial cladding with TSP foldcore under air blast loading are investigated by the numerical study in LS-DYNA.The potential application of sacrificial cladding and good performance with a low peak transmitted force and great energy absorption is demonstrated for the TSP foldcore sandwich structure,comparing with the aluminium foam.The influence of the structural parameters,such as PU foam infilled,thickness,number of core layers,and graded density,are also analyzed.