Anisotropic poroviscoelastic medium: Reflection of inhomogeneous waves at the plane boundary with restricted seepage of pore‐fluid

2021 ◽  
Author(s):  
M. D. Sharma
Keyword(s):  
Pore Fluid ◽  
Plane Boundary ◽  
Inhomogeneous Waves

Complete phenomenon of reflection at the plane boundary of a dissipative anisotropic elastic medium

2020 ◽  
Vol 224 (2) ◽  
pp. 1015-1027
Author(s):  
M D Sharma ◽  
Suman Nain
Keyword(s):  
Elastic Medium ◽  
Propagation Velocity ◽  
Sagittal Plane ◽  
Amplitude Ratio ◽  
Plane Waves ◽  
Plane Boundary ◽  
Dual Vector ◽  
Inhomogeneous Waves ◽  
Slowness Vector ◽  
Anisotropic Elastic

SUMMARY A complex slowness vector governs the 3-D propagation of harmonic plane waves in a dissipative elastic medium with general anisotropy. In any sagittal plane, this dual vector is specified with phase direction, propagation velocity and coefficients for attenuation. A generalized reflection phenomenon is illustrated for incidence of inhomogeneous waves at the stress free boundary of the medium. Each reflected wave at the boundary is characterized by its propagation direction, propagation velocity, inhomogeneity, amplitude ratio, phase shift and energy flux. These propagation characteristics are exhibited graphically for a numerical example of anisotropic viscoelastic medium.

High Resolution Electron Microscopy of internal interfaces in layered materials

1990 ◽  
Vol 48 (4) ◽  
pp. 320-321
Author(s):  
Yoichi Ishida ◽  
Hideki Ichinose ◽  
Yutaka Takahashi ◽  
Jin-yeh Wang
Keyword(s):  
Grain Boundaries ◽  
Mirror Symmetry ◽  
Functional Materials ◽  
High Resolution Electron Microscopy ◽  
Layered Materials ◽  
Plane Boundary ◽  
Chemical Information ◽  
Layer Plane ◽  
High Tc ◽  
Cubic Metals

Layered materials draw attention in recent years in response to the world-wide drive to discover new functional materials. High-Tc superconducting oxide is one example. Internal interfaces in such layered materials differ significantly from those of cubic metals. They are often parallel to the layer of the neighboring crystals in sintered samples(layer plane boundary), while periodically ordered interfaces with the two neighboring crystals in mirror symmetry to each other are relatively rare. Consequently, the atomistic features of the interface differ significantly from those of cubic metals. In this paper grain boundaries in sintered high-Tc superconducting oxides, joined interfaces between engineering ceramics with metals, and polytype interfaces in vapor-deposited bicrystal are examined to collect atomic information of the interfaces in layered materials. The analysis proved that they are not neccessarily more complicated than that of simple grain boundaries in cubic metals. The interfaces are majorly layer plane type which is parallel to the compound layer. Secondly, chemical information is often available, which helps the interpretation of the interface atomic structure.

scholarly journals Effect of Modelling Inhomogeneous Wave Conditions on Structural Responses of a Very Long Floating Bridge

2021 ◽  
Vol 9 (5) ◽  
pp. 548
Author(s):  
Jian Dai ◽  
Christos Stefanakos ◽  
Bernt J. Leira ◽  
Hagbart Skage Alsos
Keyword(s):  
Water Environment ◽  
Bridge Structure ◽  
Inhomogeneous Wave ◽  
Wave Condition ◽  
Analysis And Design ◽  
Inhomogeneous Waves ◽  
Modelling Analysis ◽  
Structural Responses ◽  
Floating Bridge ◽  
Wave Conditions

Floating bridges are suitable for connecting land parcels separated by wide and deep waterbodies. However, when the span of the crossing becomes very long, the water environment exhibits inhomogeneities which introduce difficulties to the modelling, analysis and design of the bridge structure. The wave inhomogeneity may be described by means of field measurement and/or numerical simulations. Both approaches face complications when the resolution is much refined. It is thus important to examine the effect of the resolution related to the modelling of inhomogeneous waves on the global structural responses. In this study, a hypothetical crossing at the Sulafjord is chosen, and the wave environment in the year 2015 at 10 positions along the crossing is numerically computed. Next, different inhomogeneous wave conditions are established based on the wave data at 3, 5, and 10 positions, respectively. Time-domain simulations are conducted to examine the effect of different modelling approaches of the inhomogeneous wave condition on the global responses of a long, straight and side-anchored floating bridge.

scholarly journals Compaction front and pore fluid pressurization in horizontally shaken drained granular layers

2020 ◽  
Vol 5 (5) ◽  
Author(s):  
Shahar Ben-Zeev ◽  
Einat Aharonov ◽  
Renaud Toussaint ◽  
Stanislav Parez ◽  
Liran Goren
Keyword(s):  
Pore Fluid ◽  
Fluid Pressurization ◽  
Granular Layers

scholarly journals CHLORINE ISOTOPE DATA OF CHLORIDES CHALLENGE THE PORE FLUID PARADIGM

2021 ◽  
Author(s):  
Agrinier Pierre ◽  
Bonifacie Magali ◽  
Bardoux Gérard ◽  
Lucazeaux Francis ◽  
Giunta Thomas ◽  
...  
Keyword(s):  
Pore Fluid ◽  
Chlorine Isotope ◽  
Isotope Data
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