NDLI: DEM simulations and experiments for projectile impacting two-dimensional particle packings including dissimilar material layers

Content Provider	Springer Nature Link
Author	Nishida, Masahiro Tanaka, Yusuke
Copyright Year	2010
Abstract	The dynamic response of a two-dimensional ordered particle packing composed of nylon-66 spheres 6.35 mm in diameter impacted by a spherical projectile was investigated both experimentally and numerically using the discrete element method (DEM). First, the influence of the number of layers in the particle packing on wave propagation and post-impact movement were examined. As the number of layers increased, the contact forces reaching the base plate decreased together with the rebound velocity of the projectiles. Next, the effects of dissimilar material layers were examined. The spheres in one or two layers of the particle packing were replaced with spheres made of dissimilar materials, that is, alumina ceramic (Al2O3) or steel, and it was found that the scattering of the nylon spheres above the dissimilar material layers increased. The experimental results obtained using force sensors at the base plate showed that the dissimilar material layers reduced the contact forces at the base plate. Furthermore, as the mass of the dissimilar material spheres increased, the magnitude of the contact forces at the base plate decreased, and the rebound velocity of the projectile increased.
Starting Page	357
Ending Page	368
Page Count	12
File Format	PDF
ISSN	14345021
Journal	Granular Matter
Volume Number	12
Issue Number	4
e-ISSN	14347636
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-03-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Granular bed Wave propagation Contact force Impact Rebound Engineering Thermodynamics, Heat and Mass Transfer Industrial Chemistry/Chemical Engineering Geoengineering, Foundations, Hydraulics Materials Science Engineering Fluid Dynamics Soft and Granular Matter, Complex Fluids and Microfluidics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mechanics of Materials Materials Science

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