NDLI: Characterization of the Viscous Behavior of Compacted Ceramic Particles Under Shear and Pressure Loads

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Zhou, Fuping Suresh, G. Advani Eric, D. Wetzel
Copyright Year	2003
Abstract	Ceramic armors are known to provide excellent ballistic resistance, but the precise mechanisms of projectile defeat in these systems are not fully understood. A critical stage in the penetration process is the flow of the pulverized ceramic past the projectile. To further understand this phenomenon, we are investigating the flow and energy dissipation of granular beds, specifically under conditions of high pressure. Two different viscometer systems are designed and fabricated to characterize the behavior of ceramic particles under shear stress and high pressures. The first system is a Couette flow device with ability to exert pressure on the particles during its rotation and measure the torque and angular velocity of the system. These data are used to extract viscosity and energy dissipation due to friction between particles as a function of the shear rate. The second system focuses on the movement of a cylinder through a bed of compacted ceramic particles. By measuring the force required to move the cylinder through the compacted bed, we can evaluate the effective resistance of the particle bed under various compaction pressures. By characterizing the friction coefficient, we obtain the apparent viscosity of the compacted granules under different pressure loads for low strain rates. This characterization should prove useful in understanding the shearing and dissipation mechanisms between granular particles under high pressures.
Sponsorship	Materials Division
Starting Page	145
Ending Page	149
Page Count	5
File Format	PDF
ISBN	079183719X
DOI	10.1115/IMECE2003-42991
Volume Number	Materials
Conference Proceedings	ASME 2003 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2003-11-15
Publisher Place	Washington, DC, USA
Access Restriction	Subscribed
Subject Keyword	Viscosity Torque Projectiles Shearing (deformation) Ceramics Pressure Flow (dynamics) Rotation Stress Shear rate Compacting High pressure (physics) Friction Energy dissipation Particulate matter Shear stress Shear (mechanics) Die cutting Cylinders
Content Type	Text
Resource Type	Article

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