Effect of slow dynamics on elastic properties of materials with residual and shear strains

Коробов, А. И.; Odina, N. I.; Mekhedov, D. M.

doi:10.1134/s106377101304009x

Cited by 21 publications

(18 citation statements)

References 19 publications

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“…"The slow dynamics" and its impact on "the elastic properties of materials" are specified in [Korobov et al, 2013]. The idea of the new type of rotation waves [Vikulin, 2010[Vikulin, , 2011, as the consequence of the concept envisaging that the geomedium is composed of rotating blocks, is consistent with results of theoretical and instrumental acoustic studies of 'normal' solids [Korobov et al, 2013;Pamyatnykh, Ursulov, 2012;Rudenko et al, 2012].…”

Section: A New Type Of Geodynamic Oscillationssupporting

confidence: 59%

“…The idea of a 'slow' mode "propagating with a velocity that is much lower than the velocity of sound in liquids, solid granules and gas" is theoretically and experimentally supported by results of theoretical and experimental studies [Rudenko et al, 2012]. "The slow dynamics" and its impact on "the elastic properties of materials" are specified in [Korobov et al, 2013]. The idea of the new type of rotation waves [Vikulin, 2010[Vikulin, , 2011, as the consequence of the concept envisaging that the geomedium is composed of rotating blocks, is consistent with results of theoretical and instrumental acoustic studies of 'normal' solids [Korobov et al, 2013;Pamyatnykh, Ursulov, 2012;Rudenko et al, 2012].…”

Section: A New Type Of Geodynamic Oscillationsmentioning

confidence: 99%

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Wave moment geodynamics

Vikulin

Tveritinova

Ivanchin³

2012

Acta Geophys.

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Abstract:The geomedium block concept envisages that stresses in the medium composed of rotating blocks have torque and thus predetermine the medium's energy capacity (in terms of [Ponomarev, 2008]). The present paper describes the wave nature of the global geodynamic process taking place in the medium characterized by the existence of slow and fast rotation strain waves that are classified as a new type of waves. Movements may also occur as rheid, superplastic and/or superfluid motions and facilitate the formation of vortex geological structures in the geomedium.Our analysis of data on almost 800 strong volcanic eruptions shows that the magma chamber's thickness is generally small, about 0.5 km, and this value is constant, independent of the volcanic process and predetermined by properties of the crust. A new magma chamber model is based on the idea of 'thermal explosion'/'self-acceleration' manifested by intensive plastic movements along boundaries between the blocks in conditions of the low thermal conductivity of the geomedium. It is shown that if the solid rock in the magma chamber is overheated above its melting point, high stresses may occur in the surrounding area, and their elastic energy may amount to 10 15 joules per 1 km 3 of the overheated solid rock. In view of such stresses, it is possible to consider the interaction between volcano's magma chambers as the migration of volcanic activity along the volcanic arc and provide an explanation of the interaction between volcanic activity and seismicity within the adjacent parallel arcs.The thin overheated interlayer/magma chamber concept may be valid for the entire Earth's crust. In our hypothesis, properties of the Moho are determined by the phase transition from the block structure of the crust to the nonblock structure of the upper mantle.Key words: geodynamics, force moment, rotational waves, rheid flow, gravitational waves. Аннотация: В работе развивается концепция блоковой геосреды применительно к геодинамическому (сей-смическому и вулканическому) процессу. Работу, в целом, можно представить в виде четырех частей: введе-ния, шести разделов, кратко описывающих разработанную ранее автором ротационную модель сейсмотекто-нического процесса, трех разделов, посвященных развитию блоковой концепции применительно к вулкани-ческому процессу, и обсуждения результатов. Recommended by S.I. ShermanВо введении на примере анализа исследований, проводимых в течение последних десятилетий сотрудни-ками Института земной коры СО РАН, показывается, что концепция тектонофизического процесса Байкаль-ской рифтовой зоны, разрабатываемая в рамках разломной тектоники на региональном уровне, не позволяет видеть всю картину в целом. Региональные концепции существенным образом опираются на представления GEODYNAMICS & TECTONOPHYSICS P U B L I S H E D B Y T H E I N S T I T U T E O F T H E E A R T H ' S C R U S T S I B E R I A N B R A N C H O F R U S S I A N A C A D E M Y O F S C I E N C E S R e c e n t G e o d y n a m i c s 345А.V. Vikulin: Geodynamics as wave dynamics… о разломах, ...

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Section: A New Type Of Geodynamic Oscillationssupporting

confidence: 59%

Section: A New Type Of Geodynamic Oscillationsmentioning

confidence: 99%

Wave moment geodynamics

Vikulin

Tveritinova

Ivanchin³

2012

Acta Geophys.

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“…In addition, a threshold type behavior of the reso nance frequency of the resonator as a function of the vibration amplitude was revealed. Such a behavior of the resonance frequency is typical of media with a nonclassical nonlinearity [13][14][15][16][17]. The presence of strong dispersion of the flexural Lamb mode leads to violation of synchronicity between the principal wave and its harmonics, and no progressive increase in the higher elastic harmonic amplitudes is possible for the traveling flexural Lamb waves.…”

Section: Discussionmentioning

confidence: 99%

“…It should be noted that, in solids with a quadratic nonlinearity, the velocity of elastic waves does not depend on their amplitude while, in the case of a cubic nonlinearity, the elastic wave velocity quadratically depends on the wave amplitude [29]. The linear dependence of the resonator resonance frequency on the wave amplitude and the threshold type behavior of this dependence points to the presence of nonclassical nonlinearity in the material of resonator D1 [13][14][15][16][17].…”

Section: Experimental Study Of the Fast Dynamics Effect In A Resonatomentioning

confidence: 99%

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Diagnostics of metal plates with residual stresses and defects by nonlinear scanning laser vibrometry

2015

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Nonlinear scanning laser vibrometry is used for diagnostics of cylindrical resonators made of poly crystalline aluminum alloy with residual stresses and defects. The diagnostics is performed with flexural Lamb waves. The eigenmode frequency of such a resonator is found to depend on the amplitude of flexural Lamb waves excited in it (the fast dynamics effect), which points to the presence of a nonclassical nonlinear elastic ity in the resonator material. Studying the nonlinear interactions between amplitude modulated flexural Lamb waves in resonators allow the determination of the coordinates of defects and residual strains in them.

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