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XU ZHAOYONG, BAO YIFENG, LI ZHONGFUcom sh advance. 1984: THE EFFECT OF SIZE OF CRACK ON ENERGY OF SHEAR FRACTURE. Acta Seismologica Sinica, 6(3): 362-368.
Citation: XU ZHAOYONG, BAO YIFENG, LI ZHONGFUcom sh advance. 1984: THE EFFECT OF SIZE OF CRACK ON ENERGY OF SHEAR FRACTURE. Acta Seismologica Sinica, 6(3): 362-368.
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THE EFFECT OF SIZE OF CRACK ON ENERGY OF SHEAR FRACTURE

  • Seismological Bureau of Yunnan Province

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  • Published Date: August 31, 2011
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  • This paper deals with an experiment on cylindrical marble samples in which artificial unlinked cracks making angles of about 30?with the cylindrical axis are cemented by epoxy resin. The effect of crack size and filling material on energy of shear fracture are studied experimentally. The results are that as the relative area of the cracks increases from zero to 90% the shear fracture energy decreases gradually from (6.92.1) 103J/m2 to(0.60.5)103J/m2. The theoretical values of stress drop obtained by Knopoff's method and the method of slip-weakening model are almost the same. However, the ratio of these values of stress drop to that observed experimentally increases gradually and reaches about 10 as the relative crack area increases from zero to 90%. At the same time, some possible factors causing the large difference of stress drop during earthquakes and rock failure and the large difference of values of shear fracture energy obtained by various methods, are discussed. It has been proposed that the effect of the honeycomb-contact structure of fault surfaces may be important.
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    • References (1)
  • [1] Kanamori, H., and Anderson. D. L., Theoretical basis of some empirical relation in Seismology,Bull. Seis. Soc. Am., 65, 1073——1095, 1975.

    [2] Mogi, K., Fracture and flow of rock, Tectonophysics, 13, 541——568, 1972.

    [3] Byerlee, J. D., and Brace, W. F., Stick——slip stable sliding and earthquakes——effect of rock type, pressure, Strain rate and stiffness, J. Geophys. Res., 73, 6031——6037, 1968

    [4] Wong, T. F., Shear fracture energy of Westerly granite from post failure behaviour,J.Geopliys. Res.,87 ( B2 ), 990——1000, 1982.

    [5] 许昭永,李忠富,包一峰,舒加宁,彭万里,裂缝大小对岩石强度及应力降的影响,岩石力学与工程学报(创刊号),1, 1, 1982.

    [6] Rice, J. R., The Mechanics of earthquake rupture, in physics of the Earth's interior, edited by A. M Dziewonski and E. Boschi, Italian Physical Society, 576——606, 1982.

    [7] Rummel, F., Alhed H. J., and Frohn, C,Gerlands Beitr, Geoplv.ys., 83, 1979.

    [8] Knopoff, L., Energy release in earthquakes, Geophys. J. Roy. Astro. Soc., 1,1, 44——51, 1958.

    [9] 陈培善,分析地履波估算地壳内的应力值,地震学报,3, 3, 251——263, 1981.

    [10] Starr, A. T., Slip in a crystal and rupture in a solid due to shear, Proc. Camb.Phil. Soc., 24, 480——500, 1928.

    [11] 布林,H.K.,从地下坑道天然应力测量分析中得出的几点结论,地壳应力状态,(中译本),地震出版社,98——103,1978.

    [1] Kanamori, H., and Anderson. D. L., Theoretical basis of some empirical relation in Seismology,Bull. Seis. Soc. Am., 65, 1073——1095, 1975.

    [2] Mogi, K., Fracture and flow of rock, Tectonophysics, 13, 541——568, 1972.

    [3] Byerlee, J. D., and Brace, W. F., Stick——slip stable sliding and earthquakes——effect of rock type, pressure, Strain rate and stiffness, J. Geophys. Res., 73, 6031——6037, 1968

    [4] Wong, T. F., Shear fracture energy of Westerly granite from post failure behaviour,J.Geopliys. Res.,87 ( B2 ), 990——1000, 1982.

    [5] 许昭永,李忠富,包一峰,舒加宁,彭万里,裂缝大小对岩石强度及应力降的影响,岩石力学与工程学报(创刊号),1, 1, 1982.

    [6] Rice, J. R., The Mechanics of earthquake rupture, in physics of the Earth's interior, edited by A. M Dziewonski and E. Boschi, Italian Physical Society, 576——606, 1982.

    [7] Rummel, F., Alhed H. J., and Frohn, C,Gerlands Beitr, Geoplv.ys., 83, 1979.

    [8] Knopoff, L., Energy release in earthquakes, Geophys. J. Roy. Astro. Soc., 1,1, 44——51, 1958.

    [9] 陈培善,分析地履波估算地壳内的应力值,地震学报,3, 3, 251——263, 1981.

    [10] Starr, A. T., Slip in a crystal and rupture in a solid due to shear, Proc. Camb.Phil. Soc., 24, 480——500, 1928.

    [11] 布林,H.K.,从地下坑道天然应力测量分析中得出的几点结论,地壳应力状态,(中译本),地震出版社,98——103,1978.
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