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INVESTIGATION OF THE RATE DEPENDENCE OF LONG-ROD PENETRATION OF GRANULAR MEDIA USING AN IMPROVED DSR ALGORITHM.
- Source :
-
AIP Conference Proceedings . 12/28/2009, Vol. 1195 Issue 1, p1357-1360. 4p. - Publication Year :
- 2009
-
Abstract
- Digital Speckle Radiography (DSR), a technique allowing measurement of the full field displacement maps in a plane within an opaque material, is used to follow the temporal progression of a long-rod (100 mm long, 10 mm diameter) penetrating a granular sample at a variety of rates. Quasi-static rates of 1.5 mm/min are achieved using an Instron machine, 5 m/s is achieved using a drop-weight and velocities between 10 and 200 m/s are achieved using a light gas gun. These experiments are carried out using a series of time delayed flash x-ray images analysed with an optimised Digital Image Cross Correlation algorithm (DICC). The subsequent data sheds considerable light on the response of granular materials to penetration at a variety of rates. Particularly, a large difference in the response of the material between quasi-static and dynamic rates is observed. [ABSTRACT FROM AUTHOR]
- Subjects :
- *GRANULAR materials
*BULK solids
*ALGORITHMS
*X-rays
*SCIENTIFIC photography
Subjects
Details
- Language :
- English
- ISSN :
- 0094243X
- Volume :
- 1195
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- AIP Conference Proceedings
- Publication Type :
- Conference
- Accession number :
- 47376081
- Full Text :
- https://doi.org/10.1063/1.3295060