Accession Number : ADA322026

Title :   Studies of the Effect of Microstructure on the Dynamic Behavior of Granular and Particulate Materials.

Descriptive Note : Final rept.,

Corporate Author : RHODE ISLAND UNIV KINGSTON DEPT OF MECHANICAL ENGINEERING AND APPLIED MECHANI CS

Personal Author(s) : Shukla, Arun ; Sadd, Martin H.

PDF Url : ADA322026

Report Date : OCT 1996

Pagination or Media Count : 263

Abstract : Results are presented of a three year experimental and theoretical study dealing with wave propagation in particulate materials. The experimental program used dynamic photoelasticity, strain gages and fiber optic sensors to collect information on model granular materials. The theoretical program developed a numerical model using discrete element methods (DEM) to simulate the dynamic behavior of granular media. The general goal of the research program was to determine relationships between granular fabric and wave propagational characteristics. DEM simulations on large two-dimensional systems with circular particles, investigated relationships of branch, wave and void vector fabric with wave speed and attenuation. Both experimental and numerical studies were conducted on model assemblies with elliptical particles.

Descriptors :   *DYNAMIC LOADS, *PHOTOELASTICITY, *GRANULAR MATERIALS, STRESS STRAIN RELATIONS, COMPUTERIZED SIMULATION, LOAD DISTRIBUTION, MICROSTRUCTURE, DYNAMIC RESPONSE, STRAIN GAGES, BLAST LOADS, PARTICULATES, FAST FOURIER TRANSFORMS, MICROMECHANICS, FORCE(MECHANICS), STRESS WAVES.

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE