|Title:||Dynamic Characterization of Powdered Ceramics|
|Abstract:||The dynamic behavior of powdered materials such as granular silica (sand), technical ceramics, and porous geological substances has importance to a variety of engineering applications. Structural seismic coupling, planetary science, earth penetration mechanics, and the performance of ceramic armors are just some of application areas. Although the mechanical behaviors of sand and other granular ceramics have been studied extensively for several decades, the dynamic behavior over a range of strain rates and pressures of such materials remains poorly understood. This paper describes how instrumented electromagnetic tube compression driven by capacitive discharge can be used to measure compaction of porous materials at moderate pressures and controlled strain rates. The technique relies on electromagnetically crushing a powder-filled conductive tube. By measuring the current as a function of time and the tube displacement through Photon Doppler Velocimetry (PDV) sufficient data can be obtained to reveal the behavior of the porous material. The method will be described in detail and example data will be shown for compaction of silica sand.|
|Publisher:||Institut für Umformtechnik - Technische Universität Dortmund|
|Is part of:||4th International Conference on High Speed Forming, March 9th-10th 2010 Columbus, Ohio, USA|
|Appears in Collections:||ICHSF 2010|
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