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タイトル: 23. Deformation and Fracture of Rocks under Confining Pressure(2) : Elasticity and Plasticity of Some Rocks
その他のタイトル: 23. 高封圧下の岩石の変形・破壊 : (第2報)弾性と塑性
著者: MOGI, Kiyoo
著者(別言語): 茂木, 清夫
発行日: 1965年9月20日
出版者: 東京大学地震研究所
掲載誌情報: 東京大学地震研究所彙報. 第43冊第2号, 1965.9.20, pp. 349-379
抄録: Results of triaxial compression tests on ten dry rocks, including peridotite, diorite, granite, andesite, trachyte, tuff, and marble, are described and the pressure dependence of Young's modulus, plasticity, and strength are discussed. With an improved strain measurement, the load and the deformation were accurately measured without any frictional error. The deformation curve was obtained with a constant strain rate, but at some stages of deformation the differential stress was reduced to zero and again increased. By this cyclic loading test, the permanent strain was separated from the elastic strain, and Young's modulus was obtained from the mean slope of the unloading or reloading curve. These rocks also showed remarkable elastic hysteresis. Young's modulus, permanent strain, and elastic hysteresis were obtained as functions of the compressional strain and the confining pressure. The transition from brittle fracture to ductile flow and the pressure dependence of strength are also discussed. According to these experimental results, the mechanical property of rocks under confining pressure seems to depend mainly on porosity besides mineral composition. A preliminary experiment on the effect of previous loading is also described.
URI: http://hdl.handle.net/2261/12204
ISSN: 00408972


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