Dynamic Stresses in Granular Assemblies with Microstructural Defects
Publication: Journal of Engineering Mechanics
Volume 118, Issue 1
Abstract
An experimental study was conducted to investigate the effects of microstructural defects, such as inclusions and voids, on the wave propagation phenomena in granular materials. The granular materials as well as the defects were simulated using circular disks in both one‐ and two‐dimensional experiments, The defects were of two types, namely, inclusions and voids. Dynamic photoelasticity and high‐speed photography were used to study the effects of these defects on the local stressfield as the stress wave passed by. The dynamic loading was achieved by detonating a small amount of an explosive on top of the model assembly. The experimental results indicate that both inclusions and voids produce local wave scattering through various reflection mechanisms. Inclusions increase the wavelength of the loading pulse and produce more local attenuation and voids can change the local energy‐transfer paths.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Hudson, J. A. (1968). “The scattering of elastic waves by granular media.” Q. J. Mech. Appl. Math., 21, 487–508.
2.
Huttington, H. B. (1950). “On ultrasonic scattering by poly crystals.” J. Acoust. Soc. Am., 22, 362–363.
3.
Knopoff, L., and Hudson, J. A. (1964). “Scattering of elastic waves by small inhomogeneities.” J. Acoust. Soc. Am., 36, 338–343.
4.
Martin, O. S. (1984). “Stress wave propagation in discrete random solids.” Wave phenomenon: Modern theory and application, Elsevier Publishing, New York, N.Y., 267–278.
5.
Mason, W. P., and Mcskimin, H. J. (1947). “Attenuation and scattering of high frequency sound waves in metals and glasses.” J. Acoust. Soc. Am., 19, 464–473.
6.
Nunziato, J. W., and Walsh, E. (1977). “On the influence of void compaction and material nonuniformity on the propagation of one‐dimensional acceleration waves in granular materials.” Arch. Ration. Mech. Anal., 64, 299–316.
7.
Papadakis, E. P. (1961). “Grain‐size distribution in metals and its influence on ultrasonic attenuation measurements.” J. Acoust. Soc. Am., 33, 1616–1621.
8.
Shukla, A., and Damania, C. (1987). “Experimental investigation of wave velocity and dynamic contact stress in an assembly of disks.” J. Exp. Mech., 27(3), 268–281.
9.
Shukla, A., and Nigam, H. (1985). “A numerical‐experimental analysis of contact stress problem.” J. Strain Anal. Engrg. Des., 20(4), 241–245.
10.
Shukla, A., and Zhu, C. Y. (1988). “Influence of the microstructure of granulai media on wave propagation and dynamic load transfer.” J. Wave‐Mater. Interaction, 3(3), 249–266.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 118 • Issue 1 • January 1992
Pages: 190 - 201
Copyright
Copyright © 1992 ASCE.
History
Published online: Jan 1, 1992
Published in print: Jan 1992
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.