Abstract
Aluminium foam has an excellent performance in terms of impact resistance and energy absorption. The experimental and numerical investigations on the blast resistance of the cylinder with aluminium foam under internal explosive load are carried out in this thesis and the factors influencing the blast resistance are analyzed. First, experiments were carried out under internal explosive load with different relative densities and explosion loads, and the defections of inner and outer layers were obtained. Second, based on the voronoi technique, a 2D finite element model of sandwich cylinders with a core of aluminium foam was constructed, the effectiveness of the model was then confirmed by conflicting results from simulations and experiments. Finally, the finite element model was used to analyze the effects of characteristic cell size and explosive load, which were reflected in the energy absorption and deflection of the outer layer. The test results show that the simulation results agree well with the experimental results. The characteristic cell size has little influence on energy absorption. In the case of homogeneous cores, the energy absorption per unit of mass decreases linearly with increasing relative density and the deflections of outer layers increase slightly.
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