GENERAL: Simulation Study of Shock Reaction on Porous Material

  title={GENERAL: Simulation Study of Shock Reaction on Porous Material},
  author={Aiguo Xu and Guangcai Zhang and X. F. Pan and Jianshi Zhu},
  journal={Communications in Theoretical Physics},
Direct modeling of porous materials under shock is a complex issue. We investigate such a system via the newly developed material-point method. The effects of shock strength and porosity size are the main concerns. For the same porosity, the effects of mean-void-size are checked. It is found that, local turbulence mixing and volume dissipation are two important mechanisms for transformation of kinetic energy to heat. When the porosity is very small, the shocked portion may arrive at a dynamical… 
6 Citations
Shock wave response of porous materials: from plasticity to elasticity
Shock wave reaction results in various characteristic regimes in porous materials. The geometrical and topological properties of these regimes are highly important in practical applications. Via
Dynamics and Thermodynamics of Porous HMX-like Material Under Shock ∗
Strong shock may induce complex processes in porous materials. We use the newly developed material-point-method to simulate such processes in an HMX-like material. To pick out relevant information,
Complex fields in heterogeneous materials under shock: modeling, simulation and analysis
Among various schemes used in analyzing the complex fields and structures, the morphological analysis and the home-built software, GISO, are briefly introduced.
Comparison Study on Characteristic Regimes in Shocked Porous Materials
We perform a comparison study on characteristic regimes in shocked porous materials whose mechanical properties cover a wide range. Via the Minkowski functional analysis, it is found that different
Simulation study on cavity growth in ductile metal materials under dynamic loading
Cavity growth in ductile metal materials under dynamic loading is investigated via the material point method. Two typical cavity effects in the region subjected to rarefaction wave are identified:


Shock-wave compression of a porous material
Porous materials may exhibit highly nonstationary behavior under shock-wave loading. The majority of existing experiments have measured the dependence between shock-wave velocity and particle
Material-point simulation of cavity collapse under shock
The collapse of cavities under shock is a key problem in various fields ranging from erosion of material, ignition of explosive, to sonoluminescence, etc. We study such processes using the
Shock Propagation in Nonreactive Porous Solids
Shock propagation and attenuation have been studied in porous graphite and aluminum foams (40% to 80% of crystal density). The effects of such material parameters as particle (or pore) shape, size,
Shock‐wave compaction of porous aluminum
Experimental data on the shock‐wave compaction of 78% dense porous aluminum are presented and compared with theoretical predictions from a mathematical theory of time‐dependent pore closure for
Generalized interpolation material point approach to high melting explosive with cavities under shock
Criterion for contacting is critically important for the generalized interpolation material point method. We present an improved criterion by adding a switching function. With this method the
Experiments of quasi static hydrostatic and uniaxial strain compression, and of shock wave propagation performed on 9% and 17% porous aluminum are presented, analyzed, and compared. Quasi static
A mechanistic model for shock initiation of solid explosives
This paper is devoted to the building of a model for the ignition and growth of a detonation in pressed solid explosives. The ignition model describes the various phenomena occurring at the
Atomistic mechanism of shock-induced void collapse in nanoporous metals
We have investigated the microstructural changes in ductile porous metals during high pressure-high strain rate loading employing atomistic simulations and explored their relation to recent
Void-containing nonlinear materials subject to high-rate loading
A new concept of dynamic potential (macrostress potential or macrostrain-rate potential), which has two components, i.e., deformation and kinetic potentials for heterogeneous materials under intense
On the collapse of cavities
Abstract. The collapse of a single cavity, or a cloud of bubbles has several physical consequences when in proximity to a structure or resident within a material during deformation. The earliest