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|Title:||Effect of nonuniform size on internal stresses in a rapid, simple shear flow of granular materials. Part 1, Two grain sizes|
|Authors:||Engineering Foundation (U.S.)|
Clarkson University. Dept. of Civil and Environmental Engineering.
Shen, Hayley H.
|Publisher:||Cold Regions Research and Engineering Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||CRREL report ; 85-2.|
Abstract: Existing theories that predict the stress-strain rate relationship in a rapidly sheared granular flow can only treat materials that are made of single-size particles. However, granular flows usually involve materials of mixed sizes. It has been observed in many laboratory studies that size distribution has a significant effect on the flow of a granular material. Despite its importance, no quantitative theory has been devised that can explain the effect of size distribution. An analytical model is developed here to quantify the stresses in a mixture of spheres with two different sizes and identical material properties. Binary collisions between adjacent particles are considered as the dominating stress-generating mechanism. Comparisons between the theoretical results and the existing laboratory data show good agreement.
|Appears in Collections:||CRREL Report|