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In this paper, the influence of arbitrary poling direction on two unequal semi-permeable cracks in a piezoelectric media is studied. Stroh’s formalism and complex variable techniques are used to formulate the problem. Closed form analytic expressions are derived for crack opening displacement...
Layered rock mass has special geologic mechanical properties. The constitutive relationship and elastic parameters play an important role in engineering design and analysis. In this paper, the constitutive relation and elastic parameters calculation model are proposed for the parallel, vertical...
In this study, the main purpose is to evaluate porosity, mineral composition, microstructure and mechanical characteristics and their relations for tight gas reservoirs in Da Qing. Therefore, Porosity, XRD, thin section observations and triaxial compress experiments are carried out for 18...
In this study, we characterize the Bauschinger effect by quantifying the isotropic and kinematic hardening in extruded 6061 aluminum alloy. Reverse loading experiments were performed up to a prestrain of 5% in both tension-followed-by-compression and compression-followed-by-tension. The...
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