Study on the Mechanical Properties of Soft Rock under Dynamic Uniaxial Compression

Abstract:

The present paper introduces the experimental study on soft rock (analogized with mortar)under dynamic uniaxial compression at the strain rates from 10 -5 to 101s-1. It is indicated that thecompressive strength of the soft rock increase with the increasing strain rate and the rising rates are higher than that of hard rock. The Young's moduli and Poisson's ratio of the soft rock increase with the increasing strain rate, but the rising rates are less than that of compressive strength. In addition, the mechanism of the strain rate effect of the soft rock is primarily analyzed based on the SEM results.

• Periodical: Key Engineering Materials (Volumes 261-263)
• Pages: 277-282
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.261-263.277
• Online since: April 2004
• Authors: Hai Bo Li, Jun Ru Li, Qing Chun Zhou, Yong Qiang Liu, X. Xia
• Keywords: Dynamic Uniaxial Compression, Mechanical Property, Soft Rock

References

[1] W. Janach, The role of bulking in brittle failure of rock under rapid compression. Int. J. Rock Mech Min. Sci., 13(1976): 177-186.

DOI: 10.1016/0148-9062(76)91284-5

[2] W.A. Olsson, The compressive strength of Tuff as a function of strain rate from 10 -6 to 10 3 /sec Int. J. Rock Mech Min. Sci., 28(1991): 115-118 5.

DOI: 10.1016/0148-9062(91)93241-w

[3] E.Z. Lajtai, E.J. Scott Duncan, B.J. Carter, The effect of strain rate on rock strength. Rock Mech. Rock Eng., 24(1991): 99-109.

DOI: 10.1007/bf01032501

[4] J . Zhao, H.B. Li, M.B. Wu and T.J. Li, Dynamic uniaxial compression tests on granite. Int. J. Rock Mech Min. Sci., 36(1999): 273-277.

DOI: 10.1016/s0148-9062(99)00008-x

[5] K.P. Chong, P.M. Hoyt, J.W. Smith and B.Y. Paulsen, Effects of strain rate on oil shale fracturing. Int. J. Rock Mech Min. Sci., 17(1980): 35-43.

DOI: 10.1016/0148-9062(80)90004-2

[6] T.L. Blanton, Effect of starin rate from 10-2 to 10 sec-1 in trxaila compresion tests on three rocks. Int. J. Rock Mech Min. Sci., 18(1981): 47-62.

[7] D.E. Grady, The mechanics of fracture under high-rate stress loading. Mechanics of geomaterials (edited by Z. Bazant), 1985, 129-155.

[8] M.B. Wu and Y.H. Liu, The effect of strain rate on the mechanical properties of rock material. Rock Soil Mech., 1(1980): 51-58˄In Chinese˅.

[9] Koji Masuda, Experimental study of strain-rate dependence and pressure dependence of failure properties of granite. J. Phys. Earth. 35(1987): 37-66.

DOI: 10.4294/jpe1952.35.37

[10] E.T. Brown, Rock Characterization testing & Monitoring, ISRM Suggested Method. (1987).

[11] G. Swan, J, Cook, S. Bruce and R. Meethan, Strain rate effect in Kimmeridge Bay Shale. Int. J. Rock Mech Min. Sci., 26(1989): 135: 149.

DOI: 10.1016/0148-9062(89)90002-8