Study of stress relaxation model of silty mudstone under triaxial compression
Abstract：The stress relaxation test of saturated silty mudstone under triaxial compression was performed with the RLJW-2000 rock servo-controlled rheology testing machine through step loading.By analyzing the characteristics of test curves,it is shown that the viscoelastic model can be used to describe the stress relaxation properties of silty mudstone.Burgers model was firstly selected to identify the stress relaxation of silty mudstone.Then two-element,four-element and six-element generalized Maxwell models were also applied in the identification.The parameters of these four models under different strain levels were obtained.According to the identification results,advantages and disadvantages of each model were analyzed and evaluated,and some conclusions were drawn.Logically,six-element generalized Maxwell model can describe accurately the stress relaxation properties of silty mudstone,but from the view point of engineering practice,two-element generalized Maxwell model is more suitable than other models to reveal the stress relaxation properties of silty mudstone.
Keywords：silty mudstonestress relaxationviscoelasticity modelBurgers modelgeneralized Maxwell model
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)