Compressive behavior of fine sand.
[摘要] The compressive mechanical response of fine sand is experimentally investigated. The strain rate, initial density, stress state, and moisture level are systematically varied. A Kolsky bar was modified to obtain uniaxial and triaxial compressive response at high strain rates. A controlled loading pulse allows the specimen to acquire stress equilibrium and constant strain-rates. The results show that the compressive response of the fine sand is not sensitive to strain rate under the loading conditions in this study, but significantly dependent on the moisture content, initial density and lateral confinement. Partially saturated sand is more compliant than dry sand. Similar trends were reported in the quasi-static regime for experiments conducted at comparable specimen conditions. The sand becomes stiffer as initial density and/or confinement pressure increases. The sand particle size become smaller after hydrostatic pressure and further smaller after dynamic axial loading.
[发布日期] 2010-04-01 [发布机构]
[效力级别] [学科分类] 材料科学（综合）
[关键词] COMPRESSION STRENGTH;BULK DENSITY;MOISTURE;PARTICLE SIZE;SAND;STRAIN RATE;MECHANICAL TESTS Materials-Mechanical properties.;Sand-Analysis. [时效性]
