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- W2385064862 abstract "The creep property of rock material is nonlinear obviously,one of the ways to solve nonlinear creep problem is to consider the parameters in creep model varying with stress and time.Some experiments have proved that the stress,time and outside conditions such as seepage will cause the change of some mechanical parameters of rock;so taking the creep parameters as variables accord with the essential attribute of rock material.The relation between stress,time and each creep parameter was investigated based on the Nishihara creep model.First of all,each creep parameter of different times under different stresses was figured out from experiment results by nonlinear least square method;and then the expressions of creep parameters vary with stress and time were put forward by nonlinear curve fitting of the creep parameters' distribution;finally form the creep equation with variable parameters by these expressions.The variable creep parameters are reflections of nonlinear characters of rock creep,from the damage mechanics' point of view,the changes of creep parameters reveal the accumulation of rock interior damage and the deteriorative process of material properties." @default.
- W2385064862 created "2016-06-24" @default.
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- W2385064862 date "2010-01-01" @default.
- W2385064862 modified "2023-09-22" @default.
- W2385064862 title "Creep equation of variable parameters based on Nishihara model" @default.
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