Modified KCC model for modelling mechanical behaviour of quartz sandstone under triaxial compression from low to high confining pressures. Issue 14 (9th November 2022)

• Record Type: Journal Article
• Authors: Sun, Yu; Liu, Zaobao; Feng, Tao; Shen, Wanqing
• Is Part Of: European journal of environmental and civil engineering. Volume 26:Issue 14(2022)
• Page Start: 6880
• Page End: 6896
• Publication Date: 2022-11-09
• Subjects: Rock mechanics -- numerical simulation -- triaxial compression test -- quartz sandstone -- KCC model; Sustainable engineering -- Periodicals; Civil engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; 628
• DOI: 10.1080/19648189.2021.1965916
• Languages: English
• ISSNs: 1964-8189

Abstract

Abstract: It is a challenge to simulate numerically the mechanical behaviours of rocks under triaxial compression at low and high confining pressures due to the limitations of constitutive models of rock-like brittle materials. This paper is devoted to developing a modified KCC (Karagozian and Case concrete) model for numerical modelling of the mechanical behaviours of Fontainebleau quartz sandstone under triaxial compression tests from low to high confining pressures. The strength surface, damage function, and the equation of state of the KCC model were modified to account for the mechanical behaviour of the quartz sandstone due to confining pressure change as indicated by a group of triaxial compression tests. The modified KCC model was then incorporated into a finite element code to simulate rock mechanical behaviours subjected to quasi-static loading. The effectiveness of the model was verified by the classic disc splitting tests. The modified KCC model was then applied to simulate the triaxial compressive properties of the quartz sandstone. It shows that the modified KCC model can effectively simulate the mechanical characteristics of quartz sandstone under low to high confining pressures.