Year: 1999
Type: article
Abstract: We present results from mesoscale modeling of impact recovery experiments on Berea sandstone using a hybrid Smooth Particle Hydrodynamic (SPH) and Discrete Element Method (DEM) approach.Each grain is represented with clusters of particles providing explicit representation of the grain/pore structure obtained from scanning electron microscope (SEM) and synthetic images.The modeling accounts for the influence of pore fluid and illustrates how grain/pore heterogeneity under dry and saturated states affects the evolution of grain damage behavior.The results show characteristics of the phenomena that are observed in impact recovery experiments.An increase in grain damage is associated with an increase in stress level and pulse duration.The grains in dry samples are extremely and irregularly fragmented and show extensively reduced porosity.Less grain damage and higher porosity are observed in saturated samples.The influence of pore fluid mitigates the interaction between grains, thus reducing fragmentation damage.This modeling approach in concert with experiments offers a unique way to understand dynamic compaction of brittle porous materials.
Authors: Swift, R. P., Hagelberg, C. R., AL, ET
Institution: Los Alamos National Laboratory
Language: English
Subfield: Mechanics of Materials
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W65452986