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A unified advanced thermo-elasto-viscoplastic constitutive model for soft rock is proposed in the critical state framework. The model is able to describe the fundamental mechanical behavior of soft rock such as elastoplastic, strain hardening and softening, time dependency, confining stress dependency, intermediate principal stress dependency and temperature dependency with one set of parameters....
The long-term stability of soft rock under high temperature conditions is very important to the safety of high-level radioactive waste (HLW) disposal. This study presents a series of triaxial compression tests and triaxial creep tests on green tuff in a temperature range of 20–80°C. Repeated tests showed that the influence of temperature was more apparent on the peak strength and creep failure time...
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