Triaxial testing of dry, cohesive powder and its application to a modified Cam-clay constitutive model

摘要: Abstract Triaxial tests were performed on wheat flour to determine the constitutive parameters for a modified Cam-clay model. This elastoplastic model consists of three critical-state parameters: λ, κ, and M . Additionally, there are two representing initial conditions material: e 0 p c All determined directly from four different triaxial tests: drained compression, undrained constant mean effective stress hydrostatic compression. The material tested flour, following standard statistical techniques, were: λ=0.13, κ=0.022 =2.1. was by comparing model-calculated deformation under loading identical those used parameters. comparisons between calculated values measured showed that compression within 95% confidence interval. investigation proved (1) models can be successfully applied dry, cohesive powders, (2) defined in soils dry powders modifying parameter determination procedure.