It is very important to theoretically analyse and numerically simulate the ground stability of welded structures, which are of recent worldwide interest.
Packing density and confining pressure have a great effect on the mechanical behavior of sand. Therefore, several kinds of models have been proposed and each of them has their own features.
Fabric anisotropy variable and density function also have a great effect on the mechanical property of anisotropic sand.
Jong Yong Kwang, a researcher at the Faculty of Material Science and Technology, based on the anisotropic critical state theory (ACST), developed a modified anisotropic hypoplastic model by incorporating the relation between fabric anisotropy variable and density function into the nonlinear part of the constitutive model.
He validated the applicability of the improved model by comparing it with the existing model and experimental data.
The results showed that the modified model can well predict the critical state response of anisotropic sand.
You can find more information in his paper “An Anisotropic Critical State Hypoplastic Model Considering the Relation Between Fabric Anisotropy Variable and Density Function” in “Mechanics of Solids” (SCI).