The book consists of detailed chapters mainly on timedependent ratedependent, thermomechanical, thermohydrodiffusion and thermohydromechanical. The ratio of the transverse to axial strain is called poisson s ratio. Gas zones, where the sonic compressional data has not been corrected for gas, will show abnormally low poisson s ratio. The poisson s ratios are denoted by lr, rl, lt, tl, rt, and tr. The basic mechanical parameters such as uniaxial compressive strength, tensile strength, elastic modulus, poissons ratio, and internal friction. This book is the result of the experience of the writer in teaching the subject of applied mechanics at the massachusetts institute of technology.
Rock mechanics is a budding branch of mining engineering and goesciences. Timedependency in rock mechanics and rock engineering isrm. Wood handbookchapter 4mechanical properties of wood. Crains petrophysical handbook calculating mechanical. Youngs modulus and poisson s ratio are measured directly in uniaxial compression or extension tests, i.
More specifically, it examines the role of formation, strength of rock materials, and wellbore mechanics, along with the impact of insitu stress changes on wellbore and borehole. The first letter of the subscript refers to direction of applied stress and the second letter to direction of lateral deformation. If the material is incompressible so e v 0 poisson s ratio is n 0. Two to three meters of rock with a poisson s ratio greater than 0. This may be considered surprising, since the poisson s ratio of common crustal minerals and rock types are known to differ e.
Practical rock mechanics 1st edition steve hencher routledge bo. In mechanics, poissons ratio is the negative of the ratio of transverse strain to lateral or axial strain. Ratio of horizontal to vertical stress for different deformation. The book considers fundamental geological processes that give rise to the nature of rock masses and control their mechanical behavior.
The international society for rock mechanics isrm brought out its blue book containing all. Basic mechanics of soils university of the west of. Effect of suction and stress on poissons ratio of argillaceous rocks. The twovolume set rock mechanics and rock engineering is concerned with the application of the principles of mechanics. It consists of five categories of topics on the science and practice of rock engineering. Drilling operations and well design covers the fundamentals of solid mechanics and petroleum rock mechanics and their application to oil and gasrelated drilling operations and well design. Since poissons ratio is a mechanical property that plays a role in the deformation of elastic materials, it is utilized in rock engineering problems associated with the deformation of rocks, e. Rock mechanics characteristics test and optimization of high. It is named after simeon poisson and denoted by the greek letter nu, it is the ratio of the amount of transversal expansion to the amount of axial compression for small values of these changes. Poissons ratio longitudinal strain and lateral strain.
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