The Experts below are selected from a list of 146040 Experts worldwide ranked by ideXlab platform
Yu V Skosarenko - One of the best experts on this subject based on the ideXlab platform.
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the stress Strain State of a ribbed cylindrical shell interacting with an elastic foundation under short term loads
International Applied Mechanics, 2015Co-Authors: Yu V SkosarenkoAbstract:A method for analyzing the stress-Strain State of a ribbed cylindrical shell that interacts with an elastic foundation under dynamic axisymmetric loading is presented. The effect of the duration of loading and the parameters of the foundation on the deflection and bending moments of the shell is analyzed Introduction. The effect of the ambient medium on the vibrations, stability, and stress-Strain State of shells under dynamic loading was addressed in many studies (5-17, 19, etc.). A literature review indicates that the dynamics of ribbed shells interacting with the ambient medium is of interest. In the present paper, we will use the Pasternak model (4) and the Winkler model to describe the ambient medium as an elastic foundation. 1. Problem Formulation. Basic Equations. Below, we will analyze the stress-Strain State (SSS) of a ribbed closed cylindrical shell under short-term loads distributed over its surface. The shell interacts with an elastic foundation that prevents the normal displacements of the shell and the rotations of its mid-surface about a circumferential coordinate line. Let the longitudinal stiffening ribs (stringers) be arranged regularly and the shell be hinged at the ends. To solve the problem, we will use the classical theory of shells and rods (1) and the energy method. The total potential energy of the disturbed elastic system and the kinetic energy are given by
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the stress Strain State of a ribbed cylindrical shell interacting with an elastic foundation under short term loads
International Applied Mechanics, 2015Co-Authors: Yu V SkosarenkoAbstract:A method for analyzing the stress–Strain State of a ribbed cylindrical shell that interacts with an elastic foundation under dynamic axisymmetric loading is presented. The effect of the duration of loading and the parameters of the foundation on the deflection and bending moments of the shell is analyzed
Serguei Iakovlev - One of the best experts on this subject based on the ideXlab platform.
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influence of a rigid coaxial core on the stress Strain State of a submerged fluid filled circular cylindrical shell subjected to a shock wave
Journal of Fluids and Structures, 2004Co-Authors: Serguei IakovlevAbstract:Abstract A submerged fluid-filled circular cylindrical shell containing a rigid coaxial cylindrical core is considered. The nonstationary dynamics of such a system subjected to an external spherical shock wave is examined, with particular emphasis on the influence that a core has on the stress–Strain State of the shell. A complete diffraction–radiation problem is considered, and an analytical–numerical solution of the problem is obtained. The influence of several different cores is analyzed, and a comparison to the case of a shell without a core is presented. Physical phenomena occurring in the shell and in the internal fluid are studied in detail. Two- and three-dimensional graphics is used to illustrate and analyze the nonstationary dynamics of the stress–Strain State. The possibility of using a rigid core as a measure of constructive safety improvement is discussed.
Marianna R Kardanova - One of the best experts on this subject based on the ideXlab platform.
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thermal conditions and stress Strain State in the grain matrix system of diamond tools
Journal of Superhard Materials, 2011Co-Authors: Martin M Yakhutlov, B S Karamurzov, Umar D Batyrov, Zh Z Berov, Marianna R KardanovaAbstract:Numerical modeling of stationary and nonstationary fields of temperatures, Strains and stresses in the diamond-matrix system is carried out. It is shown that the stress-Strain State in the system greatly depends on thermal actions and the highest stress intensity in the system is in a transition layer between the grain and the matrix. We analyze the influence of physical properties of the matrix and transition layer, grain depth in the matrix, and the coefficient of heat transfer to environment on the temperature field and stress State in the system.
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stress Strain State in the grit matrix system of a diamond tool under force disturbances
Journal of Superhard Materials, 2009Co-Authors: Martin M Yakhutlov, B S Karamurzov, Umar D Batyrov, M M Oshkhunov, Marianna R KardanovaAbstract:The stress-Strain State in the grit-matrix system of carbide-bonded diamond tools has been studied by numerical simulation. A transition layer in contact with a diamond grit is shown to be the most heavily loaded portion of the bond. The behavior of stresses in this region has been clarified for variable cutting force directions, properties of the matrix, and the transition layer. Stresses have been analyzed for various extents of the grit embedding in the matrix; critical loading parameters have been determined for various grit shapes and Poisson ratios of the bond.
Haimei Gong - One of the best experts on this subject based on the ideXlab platform.
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research of Strain State and dislocation density in the multiple algan epitaxial layers with high al content
Chinese Optics Letters, 2005Co-Authors: Da You, Qingxue Wang, Haimei GongAbstract:In this paper, the p-i-n multiple-layer Al_(x)Ga_(1-x)N sample with high Al (x>0.45) content was measured by the triple-axis X-ray diffraction measurement. The Strain State and screw dislocation density of each layer in Al_(x)Ga_(1-x)N epitaxial layers were determined by RSM (reciprocal space map) method. Then, the PV function was used to fit the rock curves separated from the RSM. At last, the Strain and the screw dislocation density of each layer were accurately calculated by fitting these rock curves.
Gong Haimei - One of the best experts on this subject based on the ideXlab platform.
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research of Strain State and dislocation density in the multiple algan epitaxial layers with high al content
Laser & Infrared, 2005Co-Authors: Gong HaimeiAbstract:The p-i-n multiple-layer Al_xGa_(1-x)N sample with high Al(x0.45) content was measured by the triple-axis X-ray diffraction method.The RSM(reciprocal space map) method and PV function were first combined to give more detailed information about the epitaxial Al_xGa_(1-x)N materials.The Strain State and screw dislocation density of each layer of Al_xGa_(1-x)N epitaxial material were determined by RSM method.Then,the PV function was used to fit the rock curves separated from the RSM.At last,the Strain and the screw dislocation density of each layer was accurately calculated.The calculated results show that the Strain-State and the screw density of Al_xGa_(1-x)N multiple-layered structure are so different with those of single-layer structure Al_xGa_(1-x)N.The differences indicated that the interaction of the Strain and the dislocation can affect those in each layer,consequently.
