NONLINEAR THEORETICAL RHEOLOGICAL MODEL FOR ROCK：A REVIEW AND SOME PROBLEMS
(1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education，Tongji University，Shanghai
200092，China；2. Department of Geotechnical Engineering，Tongji University，Shanghai 200092，China)
Abstract：This paper gives a review of the nonlinear theoretical rheological model(TRM) in which some or all of the rheological parameters are variables versus stress，time or both of the two. Various kinds of TRMs are summarized，and different methods of obtaining creep equations of the nonlinear TRMs are categorized into three basic forms：(1) Constitutive equation of the nonlinear part is given first，followed by the deduction of the whole model?s constitutive equation and creep equation. (2) Constitutive equation of the nonlinear part is given first；creep equation of this part is then deducted；and the whole model?s creep equation can thus be obtained by superposition method. (3) Creep equation of the nonlinear part is given directly and creep equation of the whole model is obtained by superposition method. A doubtful and even wrong method is also pointed out to prevent further mistakes.
夏才初，王晓东，许崇帮，等. 用统一流变力学模型理论辨识流变模型的方法和实例[J]. 岩石力学与工程学报，2008，27(8)：1 594- 1 600.(XIA Caichu，WNAG Xiaodong，XU Chongbang，et al. Method to identify rheological models by unified rheological model theory and case study[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(8)：1 594-1 600.(in Chinese))
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2011, Vol. 30 
