Shock-Wave Structure in Porous Solids

Abstract

In this paper several variations of a simple theory of dynamic compaction of porous solids are presented and discussed. This theory elaborates the conventional theory of shock propagation in such a way that the shock structures observed to propagate in these materials can be described. Steady-wave profiles are calculated for several compaction models, and the inference of constitutive equations from experimental data is discussed. It is shown that the theory can be made to reproduce steady-wave profiles observed in the usual plate-impact experiments exactly.

Mesoscale simulations of shockwave energy dissipation via chemical reactions

“…in lower shock pressures. The non-linear dependence of pressure on the density of the compressed state is consistent with the analysis of shocks on porous materials [27,28]. For a given volume collapse, lowering the activation energy (that controls reaction kinetics) leads to faster chemical waves and also result in a reduction of the shock pressure.…”

Dynamic Powder Compaction Processes

“…Последнее соотношение должно выполняться на ударной волне в любой момент времени, в том числе и сколь угодно близкий к начальному. Подставив в (19)…”

Temperature distributions inside overdriven steady-plane shock wave fronts in iron

“…where Z is the Lagrangian coordinate moving with the same velocity as the constant velocity of overdriven steady shock fronts, which is of an infinite width [11], and DT ¼ T H 2 T 0 : Therefore, it is assumed that the heat flux varies spatially slowly everywhere in the wave fronts. In general, the effective temperature thickness is greater than the effective specific volume thickness [8,9].…”