Results 11 to 20 of about 1,137 (212)
SH Waves in a Transversely Isotropic Medium-I [PDF]
Geophysical Journal of the Royal Astronomical Society, 2010 Summary In a transversely isotropic medium plane SH waves, polarized parallel to the plane of isotropy, are propagated with phase velocity (normal to the wave front) I/ = (v,,~ cos2c+ v,’ sin2e), where V, and V, are shear wave velocities perpendicular and parallel to the plane of isotropy, and e is the angle of incidence on that plane. The direction of
R. Sato, E. R. Lapwood
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SH Waves in a Transversely Isotropic Medium -- III Transradially Isotropic Sphere [PDF]
Geophysical Journal International, 1971 Summary We consider waves and rays in a sphere which is transradially isotropicat any point the phase velocity along the radius is Vv and in directions perpendicular to a radius is VH. We show that, for waves whose length is short compared with the radius of the sphere, we can describe rays and wavefronts travelling from a source in diametrial ...
R. Sato, E. R. Lapwood, K. Singh
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SH Waves in a Transversely Isotropic Medium--II Transradially Isotropic Cylinder [PDF]
Geophysical Journal International, 1968 Summary In Part I we found the relation between phase and group velocity, in a transversely isotropic medium, of shear waves polarized perpendicular to the axis of symmetry. We showed that energy travels along rays which are not perpendicular to the wavefront and obtained the appropriate law of refraction. Here we consider waves and rays in a
R. Sato, E. R. Lapwood
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Advanced Engineering Materials, EarlyView.Dislocation cutting of γ′ precipitates in Ni‐based superalloys is investigated by linking atomistic simulations with discrete dislocation dynamics. The critical cutting stress is shown to be governed by the antiphase boundary energy, while line tension effects promote edge‐preferred cutting.
Frédéric Houllé +9 more
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New AI‐Assisted Approach for Expanding the Solution Space: Application to Lattice Structure Design
Advanced Engineering Materials, EarlyView.This work introduces an innovative framework for designing structured materials by ex panding the design space through reparameterization of qualitative variables into continuous structural descriptors. Combined with machine‐learning‐based prediction and multi‐objective optimization, the approach enables the discovery of novel lattice architectures ...
G. H. Gahimbare +5 more
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New Traveltime Approximations for a Transversely Isotropic Medium
66th EAGE Conference & Exhibition, 2004 In seismic data processing it is common to use a non-hyperbolic travel-time approximation assuming weak anisotropy in a transversely isotropic medium with vertical symmetry axis. It has the correct short-spread (normal) moveout velocity, but higher order terms in offset squared are only approximations.
A. Stovas, B. Ursin
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Advanced Functional Materials, EarlyView.Photoaligned and photopatterned liquid crystal platforms provide programmable control of optical phase, polarization, and spin‐orbit interactions, enabling compact generation of structured light and complex wavefronts. This review highlights how tailored molecular orientations transform simple beams into designed optical fields, opening versatile ...
Le Zhou +6 more
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Strong Lead‐Free Bioinspired Piezoceramics for Durable Energy Transducers
Advanced Functional Materials, EarlyView.We fabricated brick‐and‐mortar lead‐free piezoceramics with Bi0.5Na0.5TiO3 monocrystal platelets as bricks and amorphous silica as mortar. The alignment of the bricks and the presence of the amorphous silica led to anisotropic residual stresses. These residual stresses increase the samples toughness, strength and durability while the brick alignment ...
Ruxue Yang +12 more
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Advanced Functional Materials, EarlyView.A new class of sulfur‐free, oxygen‐bridged dibenzofuran‐based polymers is developed for ultrahigh‐refractive‐index applications. The rigid π‐extended architecture and enhanced molecular polarizability enable exceptional optical performance, combining refractive indices up to 1.848 with high Abbe numbers and full visible transparency. This work offers a
Hend A. Hegazy +5 more
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Coordinated Architectural and Chemical Reinforcement in the Crushing Mandible of a Soldier Termite
Advanced Functional Materials, EarlyView.The crushing mandible of a soldier termite withstands substantial biting loads despite lacking mineral. Its cuticle is partitioned: convex teeth pair hardness and zinc enrichment with aligned chitin fibers for contact durability, while stiffer concave regions between teeth carry bending loads.
Andrew Tran Nguyen +16 more
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