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	Progress in binary medium modeling of geological materials
	Shen, Z. -J.
	2010-05-10 ; 2010-05-10
会议名称	Modern Trends in Geomechanics ; International Workshop on Modern Trends in Geomechanics ; Vienna, AUSTRIA ; Web of Science
关键词	SOILS Physics, Applied
中文摘要	In this study the mechanism of breakage of structural geological materials under different confining stresses was investigated. Four kinds of failure modes were distinguished: bulging rupture, shearing rupture, shearing crushing, and compression crushing. The basic properties of the mechanical behavior were summarized as elastic deformation, plastic yielding, and brittle rupture, which in other terms can be represented by springs, sliders, and bonded bars, respectively. Based on these assumptions, the geological materials were conceptualized as binary mediums consisting of structural blocks and broken cells, which were named as the bonding element and frictional element, respectively. By assuming that the bonding element was the ideal elasto-brittle body and the frictional element was the elasto-plastic body, and by using the homogenization theory of heterogeneous materials, the stress-strain relations were derived in an integrated form and in an incremental form according to the deformation theory of plasticity and the flow theory of plasticity. In these equations two sets of parameters are included, i.e., breakage coefficients and local stress coefficients. They can be determined by using curve fitting method with experimental data. Equations in the integrated form have been used in some engineering problems, such as the stability of cut slope and wetting deformation of loess foundation.
会议录出版者	SPRINGER-VERLAG BERLIN ; BERLIN ; HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/20168]
专题	清华大学
推荐引用方式 GB/T 7714	Shen, Z. -J.. Progress in binary medium modeling of geological materials[C]. 见:Modern Trends in Geomechanics, International Workshop on Modern Trends in Geomechanics, Vienna, AUSTRIA, Web of Science.

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