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Transverse isotropy information


Transverse Isotropy is observed in sedimentary rocks at long wavelengths. Each layer has approximately the same properties in-plane but different properties through-the-thickness. The plane of each layer is the plane of isotropy and the vertical axis is the axis of symmetry.

A transversely isotropic material is one with physical properties that are symmetric about an axis that is normal to a plane of isotropy. This transverse plane has infinite planes of symmetry and thus, within this plane, the material properties are the same in all directions. Hence, such materials are also known as "polar anisotropic" materials. In geophysics, vertically transverse isotropy (VTI) is also known as radial anisotropy.

This type of material exhibits hexagonal symmetry (though technically this ceases to be true for tensors of rank 6 and higher), so the number of independent constants in the (fourth-rank) elasticity tensor are reduced to 5 (from a total of 21 independent constants in the case of a fully anisotropic solid). The (second-rank) tensors of electrical resistivity, permeability, etc. have two independent constants.

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Transverse isotropy

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A transversely isotropic material is one with physical properties that are symmetric about an axis that is normal to a plane of isotropy. This transverse...

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Isotropy

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In physics and geometry, isotropy (from Ancient Greek ἴσος (ísos) 'equal', and τρόπος (trópos) 'turn, way') is uniformity in all orientations. Precise...

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Seismic anisotropy

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anisotropy, both of them are called transverse isotropy (it is called transverse isotropy because there is isotropy in either the horizontal or vertical...

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Elastic modulus

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excitation technique Proportional limit Stiffness Tensile strength Transverse isotropy Elasticity tensor Askeland, Donald R.; Phulé, Pradeep P. (2006)....

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Linear elasticity

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44}&0\\0&0&0&0&0&C_{66}\end{bmatrix}}.} When the transverse isotropy is weak (i.e. close to isotropy), an alternative parametrization utilizing Thomsen...

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SRAS

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morphology. The technique is applicable to any crystal structure, however transverse isotropy means the full orientation cannot be determined in hexagonal materials...

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Valery Fabrikant

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advances in 3D crack and contact analysis of elastic solids with transverse isotropy and multifield coupling. Mathieu Beauregard, La folie de Valery Fabrikant:...

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Hill yield criterion

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perpendicular to the rolling direction. For the special case of transverse isotropy we have R = R 0 = R 90 {\displaystyle R=R_{0}=R_{90}} and we get...

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Mercator projection

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The Mercator projection is conformal. One implication of that is the "isotropy of scale factors", which means that the point scale factor is independent...

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Tests of special relativity

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be interpreted in different ways when viewed individually. For example, isotropy experiments such as Michelson-Morley can be seen as a simple consequence...

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Anisotropy

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structural property of non-uniformity in different directions, as opposed to isotropy. An anisotropic object or pattern has properties that differ according...

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Huygens principle of double refraction

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propagation. Materials can be classified into two categories based on their isotropy. Materials that are isotropic have the same physical characteristics throughout...

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Phonon polariton

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relation is most easily derived for diatomic ion crystals with optical isotropy, for example sodium chloride and zinc sulfide. Since the atoms in the crystal...

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Length contraction

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play the same role in Minkowski geometry (the Lorentz group forms the isotropy group of the self-isometries of the spacetime) which are played by rotations...

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Timeline of luminiferous aether

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fundamental tests are Michelson–Morley experiment (proves light speed isotropy) and Ives–Stilwell experiment (proves time dilation) 1934 – Georg Joos...

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Birefringence

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(i.e., stretched or bent) causing a loss of physical isotropy and consequently a loss of isotropy in the material's permittivity tensor; Form birefringence...

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Index of optics articles

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fiber optical fiber connector optical illusion optical instrument optical isotropy optical lens design optical modeling and simulation optical path optical...

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Lie algebroid

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{\displaystyle {\mathfrak {g}}_{x}(A)=\ker(\rho _{x})} is a Lie algebra, called the isotropy Lie algebra at x {\displaystyle x} the kernel g ( A ) = ker ⁡ ( ρ ) {\displaystyle...

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Standard Model

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predominance of matter over antimatter (matter/antimatter asymmetry). The isotropy and homogeneity of the visible universe over large distances seems to require...

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Lie groupoid

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diffeomorphism; the unit map u {\displaystyle u} is a smooth embedding; the isotropy groups G x {\displaystyle G_{x}} are Lie groups; the orbits O x ⊆ M {\displaystyle...

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Aurora

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source region of discrete auroras inferred from their relationship with isotropy boundaries of energetic particles". Annales Geophysicae. 15 (8): 943. Bibcode:1997AnGeo...

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