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Shi D.-Y.,Beijing Institute of Technology | Shi D.-Y.,Command Institute of Engineer Corps | Zhang Q.-M.,Beijing Institute of Technology | Fu Y.-S.,Fuzhou University | Xia C.-F.,Command Institute of Engineer Corps
Binggong Xuebao/Acta Armamentarii | Year: 2010

The bulging process of reinforced concrete surface under internal blast loading was studied. A high-speed motion analysis system was used to record the dynamic bulging process of reinforced concrete surface to obtain its bulge contour, central displacement and bulging velocity curves. A separable reinforced concrete numerical model and fluid-solid interconnection method were used to predict the development of surface bulge in LS-DYNA. The experimental results show that the velocity of surface bulge is controlled mainly by the pressure of explosive gas, and the stress wave cracks the concrete initially. The blasting crater profile is similar to a ladder. Numerical simulation results show that the numerical model can be used to predict the bulging process of surface, and the numerical results coincide well with the experimental data. Source


Shi D.-Y.,Beijing Institute of Technology | Shi D.-Y.,Command Institute of Engineer Corps | Zhang Q.-M.,Beijing Institute of Technology | Xia C.-F.,Command Institute of Engineer Corps | And 2 more authors.
Binggong Xuebao/Acta Armamentarii | Year: 2012

A new foil method to produce an explosively formed projectile (EFP) with canted tail was presented and verified through numerical simulation. EFP with canted tail could be generated by bonding the rotation-symmetrically arranged foils on the surface of liner. The formation process of EFP was calculated using a fluid structure interaction (FSI) model in LS-DYNA, and a characterization technique of canted tail was established. The numerical results of six degrees of freedom ballistic trajectory show that the canted tail can produce a roll moment, and its spin can attenuate the amplitude of attack angle and the impact errors. Source

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