A THERMO-ELASTO-VISCOPLASTIC MODEL FOR SOFT SEDIMENTARY ROCK
作者： Sheng Zhang , Feng Zhang
DOI: 10.3208/SANDF.49.583
关键词:
摘要: ABSTRACT In this paper, a new thermo-elasto-viscoplastic model is proposed, which can characterize thermodynamic behaviours of soft sedimentary rocks. Firstly, as in the Cam-clay model, plastic volumetric strain consists two parts, stress-induced part and part, used hardening parameter. Both parts be derived from an extended e-ln p relation deduced based on concept ‘equivalent stress’. Secondly, regarding rocks heavily overconsolidated soil same way proposed by Zhang et al. (2005), subloading yield surface (Hashiguchi Ueno, 1977; Hashiguchi, 1980; Hashiguchi Chen, 1998) void ratio difference are equivalent stress. Furthermore, time-dependent evolution equation for formularized, considers both influences temperature stresses. Finally, it proved that satisfies theorems framework non-equilibrium thermodynamics.
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