Relations of complete creep processes and triaxial stress-strain curves of rock

Abstract

Based on the results of triaxial compressive creep tests for five kinds of rock under the different stress loading, unloading and cycle-loading-unloading conditions, the creep deformation is not only a function of stress and time, but also it has the corresponding relations to the triaxial stress-strain curves of rock. The deformation properties of soften-strain, harden-strain and ideal plasticity presented by conventional triaxial compressive test curves under the different stress states were utilized, and the creep characteristics, the creep starting stress and the different entire creep process curves of rock were studied systematically according to creep experiment results, and the relations of the triaxial stress-strain curves to the creeping starting stress, the terminating curve, the different creep processes, and the different creep fracture properties were established. The relations presented in this paper were verified partially by the creep experiment results of five types of rock.

Keywords

rock / triaxial stress-strain curve / complete creep process / creep fracture properties / creep starting and ending

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