Dynamics of Heterogeneous Materials pp 246-306 | Cite as

# Transformation of Shocks in Laminated and Porous Materials

## Abstract

Impulse transformation in laminates and porous materials has important practical applications connected with impact and blast mitigation. The investigation of strong shock-wave dynamics in laminar media is focused mainly on two important aspects. One is wave transformation, for example, attenuation or amplification of the shock amplitude as a function of the laminar system structure. Zababakhin [1965], [1970] predicted that as the layer thickness continuously decreased with distance for a one-dimensional system of alternating materials with different densities, the phenomenon of unlimited cumulation of the shock wave could be obtained. This was a first demonstration of unrestricted cumulation which is not related to the centripetal motion of matter. Later, this tendency was numerically and experimentally confirmed (Kozyrev, Kostyleva, and Ryazanov [1969]; Ogarkov, Purygin, and Samylov [1969]; Fowles [1979]). The successful application of this idea was demonstrated by the launching of the thin titanium plate to velocities of 16 km/s using a multiply graded-density impactor with increasing shock impedance from the impact surface in sequence TPX-plastic, magnesium, aluminum, titanium, copper, and tantalum (Chhabildas, Kmetyk, Reinhard, and Hall [1996]). This system tailors the time-dependent stress pulse to launch the flier plate intact by using a precisely controlled thickness of each layer.

## Keywords

Shock Wave Particle Velocity Detonation Product Explosive Charge Laminar Material## Preview

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## References

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