Investigation on Creep Characteristics of Rock-Like with Precast Internal Fissures under Different Temperatures and Confining Pressures

Abstract:

In order to study the effect of temperature-confining pressure coupling on the creep behavior of rock-like specimen with precast internal fissures, the creep tests under different temperatures and confining pressures are carried out. The test results show that the rock presents primary creep stage and steady creep stage at low stress levels. Under the condition of high stress, the creep process of rock shows an obvious accelerated creep stage. The curve of accelerated creep stage of rock gradually smoothing with the increase of confining pressure, and the corresponding creep failure time gradually increases. The failure under low confining pressure is mainly tensile failure. The high confining pressure is the shear failure, or even the mixture of shear and plastic failure.

• Periodical: Materials Science Forum (Volume 1032)
• Pages: 120-125
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1032.120
• Online since: May 2021
• Authors: Peng Du*, Yong Yan Wang
• Keywords: Creep Test, Internal Cracks, Rock

References

[1] WANG Y, WANG Y. Experimental Research on Creep Behavior of Soft Rock Under Complex Enviorment [J]. Journal of Shandong University of Science and Techology (Natural Science), 2014, 33(03): 54-59.

[2] Du Peng. Wang.YY. Study on the Long-Term Reliability of the Tangshuiya Reservoir Dam [J]. Journal of Coastal Research, 2020, (115): 556~560.

DOI: 10.2112/jcr-si115-150.1

[3] International Journal of Rock Mechanics and Mining Sciences, 1999 (1): 127-138.

[4] WANG Yongyan，WANG Yanchun.Numerical simulation of creep law in deep soft rock tunnel under thermal- mechanical-chemical coupling effect[J]. Journal of China coal society，2012, 37(S2): 275-279.

[5] WANG Yongyan, LÜ Yimei, XIAO Zhijuan, et al. Research on sandstone creep models under chemical corrosion[J]. Journal of China coal society, 2010, 35(7): 1095-1098.

[6] Song fei, Zhao Fa-suo, Li Ya-lan. Testing study on creep properties for gypsum breccias [J]. Hydrogeology & Engineering Geology, 2005, (03):94-96.

[7] HAN Bing, WANG Zhiyin, HAO Qingze. Study of damage and bifurcation properties of some granites based on triaxial creep experiment [J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(Supp.2):4 123–4 129.

[8] Hu Yun-Hua, Liu Quan-Sheng. Experiment study on mechanical properties of granites unser repeated loading and unloading[J]. International Journal of Modern Physics B, 2008, 22(9-11):1634-1639.

DOI: 10.1142/s0217979208047183