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Micromechanical model of rough contact between rock blocks with application to wave propagation

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The relationship between effective stiffness of rough contacts of rock blocks and transmission of plane waves is well known. Effective stiffness of a rough contact may be related to the force-deformation behavior of the asperity contacts and the statistical description of rock joint surface topography through micromechanical methods. In this paper, a micromechanical methodology for computing the overall rock contact effective stiffness is utilized along with the imperfectly bonded interface model to investigate how transmitted and reflected wave amplitudes are affected by the incident wave frequency, rock joint closure and the existing rock joint normal stress conditions. As a result, expressions for reflected and transmitted wave amplitudes as well as group time delay of the wave-packets are obtained and parametrically evaluated.
Czasopismo
Rocznik
Strony
1109--1128
Opis fizyczny
Bibliogr. 28 poz.
Twórcy
autor
autor
  • Department of Civil Engineering, University of Kansas, Lawrence, KS, USA, amisra@ku.edu
Bibliografia
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  • Brown, S.R., and C.H. Scholz (1985), Closure of random elastic surfaces in contact, J. Geophys. Res. 90, B7, 5531-5545, DOI: 10.1029/JB090iB07p05531
  • Brown, S.R., and C.H. Scholz (1986), Closure of rock joints, J. Geophys. Res. 91, B7, 4939-4945, DOI: 10.1029/JB091iB05p04939.
  • Gu, B., R. Suarez-Rivera, K.T. Nihei, and L.R. Myer (1996), Incidence of plane waves upon a fracture, J. Geophys. Res. 101, B11, 25337-25346.
  • Johnson, K.L. (1985), Contact Mechanics, Cambridge University Press, London. Kendal, K., and D. Tabor (1971), An ultrasonic study of area of contact between stationary and sliding surfaces, Proc. R. Soc. A 323, 321-340, DOI: 10.1098/rspa.1971.0108.
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  • Misra, A. (1995), Interfaces in particulate materials. In: A.P.S. Selavadurai and .P. Boulon (eds.), Mechanics of Geomaterial Interfaces, 513-536,
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  • Misra, A. (1997), Mechanistic model for contact between rough surfaces, J. Eng. Mech., 123, 5, 475-484, DOI: 10.1061/(ASCE)0733-9399(1997)123:5(475).
  • Misra, A. (1999), Micromechanical model for anisotropic rock joints, J. Geophys. Res. 104, 23175-23187, DOI: 10.1029/1999JB900210.
  • Misra, A. (2002), Effect of asperity damage on shear behavior of single fracture, Eng. Fracture Mech. 69, 17, 1997-2014, DOI: 10.1016/S0013-7944(02)00073-5.
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  • Yoshioka, N. (1994), Elastic behavior of contacting surfaces under normal loads: A computer simulation using three-dimensional surface topographies, J. Geophys. Res. 99, 15549-15560, DOI: 10.1029/94JB00938.
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BSL7-0028-0032
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