Mapping Grain Strains in Sand Under Load Using Neutron Diffraction Scanning
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Towards the improvement of the understanding of force/stress distribution in granular media under load, a new experimental approach is suggested. Neutron diffraction, a non-conventional experimental technique, has been successfully used to map the evolution of intragranular strains in sand specimens loaded in a novel plane-strain apparatus. Representative preliminary results from recent experiments are presented, focusing on the correlation between the macro- and micro-scale response of the material, to highlight the potential of the experimental approach.
KeywordsGranular mechanics Grain-strain Neutron diffraction Plane-strain
The authors wish to thank Professor Gary Couples and his group at the Institute of Petroleum Engineering of Heriot-Watt University in Edinburgh, UK, as well as Drs Giorgos Nikoleris and Axel Nordin and their group at the Division of Product Development of Lund University in Lund, Sweden, for their contribution in the design and the construction of the plane-strain loading apparatus.
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