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- W2022348569 abstract "Some of the best existing constitutive models for granular materials are based on the microkinematic assumption that the velocity gradient is a direct result of interparticle slip. For instance in the stress-dilatancy theory (Rowe, 1962, 1971) and in the double sliding, free rotating model (de Josselin de Jong, 1971, 1976, 1977 a, b) the mechanism of interparticle slip plays a central role. Oda, Konishi and Nemat-Nasser (1982) have concluded from biaxial compression tests that also interparticle rolling appears to be a major microscopic deformation mechanism. This conclusion was based on the observed relative displacements of the interparticle contact points. In this paper a method for the determination of the relative importance of the interparticle mechanisms of slip and rolling is applied in which the measured macroscopic velocity gradient is decomposed into 2 components, namely a component due to interparticle slip and a component due to interparticle rolling and combined rotation of the rigid particles in contact. From one of the aforesaid biaxial compression tests it is found that in the post-peak interval the contribution to the velocity gradient by the mechanism of interparticle slip is still larger than the contribution by interparticle rolling but the latter is significant too." @default.
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- W2022348569 date "1984-03-01" @default.
- W2022348569 modified "2023-09-27" @default.
- W2022348569 title "Decomposition of Velocity Gradient into Interparticle Slip and Rolling" @default.
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- W2022348569 doi "https://doi.org/10.3208/sandf1972.24.17" @default.
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