Nondestructive identification of impurities in granular medium

Hong, Jongbae; Xu, Aiguo
December 2002
Applied Physics Letters;12/16/2002, Vol. 81 Issue 25, p4868
Academic Journal
We found differing characteristics in the backscattered signal depending on the presence of light and heavy impurities in a granular chain. The difference is due to soliton confinement in the region of the light impurity of the granular medium, while there is no such phenomenon for the case of a heavy impurity. This difference may be used to discriminate nondestructively between light and heavy impurities in the granular medium.


Related Articles

  • Impulse Propagation in Granular Systems. Sen, Surajit; Chakravarti, Soumya; Visco, Donald P.; Nakagawa, Masami; Wu, David T.; Agui, Juan // AIP Conference Proceedings;2003, Vol. 658 Issue 1, p357 

    We review recent developments on the topic of impulse propagation in assemblies of elastic beads, where the beads interact upon contact via the (nonlinear) Hertz potential. The role of solitary waves in granular systems is emphasized. The effects of impurities, disorder and restitution are...

  • Solitons in hierarchical Korteweg-de Vries type systems. Ilison, Lauri; Salupere, Andrus // Proceedings of the Estonian Academy of Sciences, Physics, Mathem;Mar2003, Vol. 52 Issue 1, p125 

    Wave propagation in dilatant granular materials is studied by using a hierarchical Korteweg-de Vries type evolution equation. The model equation is solved numerically under harmonic initial conditions. The behaviour of the solution is described and analysed over a wide range of material...

  • Nonlinear waves in dissipative microstructured two-dimensional solids.  // Proceedings of the Estonian Academy of Sciences, Physics, Mathem;Jun2007, Vol. 56 Issue 2, p75 

    Plane Cosserat solids are introduced. It is shown that only one parameter is needed to describe intrinsic rotation. The field equations are simple enough to study the propagation of nonlinear waves and can be reduced to some particular form that admits different nonlinear waves, including...

  • Highly nonlinear solitary waves in chains of hollow spherical particles. Ngo, Duc; Griffiths, Stephane; Khatri, Devvrath; Daraio, Chiara // Granular Matter;Apr2013, Vol. 15 Issue 2, p149 

    We study the dynamic response of one- dimensional granular chains composed of uniform hollow spheres excited by an impulse, and we observe the formation and propagation of highly nonlinear solitary waves. We find that the dynamics of these solitary waves are different from the solitary waves...

  • Nonlinear grain-grain forces and the width of the solitary wave in granular chains: a numerical study. Sun, Diankang; Sen, Surajit // Granular Matter;Apr2013, Vol. 15 Issue 2, p157 

    Any impulse results in the formation of a solitary wave of time averaged width $$W$$ in a granular chain. If the grain-grain interaction potential $$V\sim \delta ^n$$, where $$\delta $$ is the distance by which the grains approach each other, then it is well established that $$n\ge 2$$. Here we...

  • Nonlinear, Statistical and Applied Physics of Solitary Wave-like Objects in Granular Systems. Diankang Sun; Ávalos, Edgar; Doney, Robert L.; Simion, Robert P.; Sokolow, Adam; Sen, Surajit // AIP Conference Proceedings;7/1/2009, Vol. 1145 Issue 1, p431 

    We consider a simple problem that of a horizontal alignment of identical grains, and insure that the grains are in gentle mutual contact and held between two rigid fixed end walls. Grain-grain interactions are intrinsically nonlinear according to the Hertz law and hence no sound waves can...

  • Localizing energy in granular materials. Przedborski, Michelle A.; Harroun, Thad A.; Sen, Surajit // Applied Physics Letters;12/14/2015, Vol. 107 Issue 24, p1 

    A device for absorbing and storing short duration impulses in an initially uncompressed onedimensional granular chain is presented. Simply stated, short regions of sufficiently soft grains are embedded in a hard granular chain. These grains exhibit long-lived standing waves of predictable...

  • On Numerical Simulation of Propagation of Solitons in Microstructured Media. Salupere, A.; Ilison, L.; Tamm, K. // AIP Conference Proceedings;10/30/2008, Vol. 1067 Issue 1, p155 

    Wave propagation in microstructured media is simulated numerically making use of two different models. In the first case a Korteweg–de Vries type equation is used for modeling 1D wave motion in granular materials. In the second case a Boussinesq type equation is applied for modeling 1D...

  • Highly nonlinear solitary waves in chains of cylindrical particles. Khatri, Devvrath; Ngo, Duc; Daraio, Chiara // Granular Matter;Feb2012, Vol. 14 Issue 1, p63 

    We study the dynamic response of uniform granular chains composed of short cylindrical particles excited by an impulse. The particles in the chains are arranged with their axes orthogonal to the chain's axis, and the particles maintain a constant relative orientation angle. We study the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics