Energy Dissipation Analysis on Unloading Confining Pressure Failure Process of Rock Material

Abstract:

The energy dissipation law of rock material are analyzed comprehensively by studying the energy exchange between test machine and rock sample in two typical stress-strain curve of unloading tests. The relationships between energy, deformation and confining pressure in unloading confining pressure failure process are expected to be found based on energy dissipation analysis. It shows that the energy dissipation is greatly related to the failure characteristic of rock material and confining pressure. Both two unloading tests show that energy dissipation has a nonlinear relationship with time and linear relationship with lateral deformation. The much the confining pressure is in unloading condition, the more the energy dissipation is under the same lateral deformation, and the obviously the rock sample suffers brittle failure.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 398-401
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.398
• Online since: December 2012
• Authors: Fu Jiang Chen*, Hong Xia Li, Ze Qi Zhu
• Keywords: Energy Dissipation, Rock Mechanics, Strain Energy, Unloading Confining Pressure

References

[1] YOU Mingqing, HUA Anzeng. Chinese J. Rock Mech. Eng. 17, 92(1998).

[2] XIE Heping, PENG Ruidong, JU Yang. Chinese J. Rock Mech. Eng. 23, 3565(2004).

[3] XIE Heping, JU Yang, LI Liyun. Chinese J. Rock Mech. Eng. 24, 3003(2005).

[4] HA Qingling. Chinese J. Rock Mech. Eng. 16, 386(1997).

[5] HUA Anzeng, KONG Yuanbo, LI Shiping, et al. Journal of China Coal Society, 20, 389(1995).

[6] YOU Mingqing, HUA Anzeng. Chinese J. Rock Mech. Eng. 17, 24(1998).