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Report No.
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Theoretical study of rock for estimating long-term behavior; FY2010 (Contract research)

Ichikawa, Yasuaki*; Tanno, Takeo; Hikima, Ryoichi; Sanada, Hiroyuki; Matsui, Hiroya ; Sato, Toshinori 

A rock mass is a complex entity, including several classes of discontinuities and numerous heterogeneous and anisotropic minerals. From investigations of rock samples, we know that crystalline rock is a complex mix of minerals, grain boundaries and microcracks. Deformation and failure mechanisms may be more completely understood if we are able to correctly characterize the microscale composition and grain boundary properties. Amongst the rock-forming minerals, especially quartz and biotite in granite, numerous microcracks are developed. It is important to study coupled mechanical and chemical factors in crystalline rock for long-term behavior study. This report presents the results of the following FY2010 activities. (1) Explanation of nonlinear fracture mechanics, (2) Pressure dissolution experiments of using specimens of single quartz, (3) Theory study on the rate of quartz dissolution, (4) Homogenization theory for fractured rock

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