28,506 research outputs found
Two-dimensional analysis of size effects in strain-gradient granular solids with damage-induced anisotropy evolution
No full textWe analyze in two dimensions the mechanical behavior of materials with granular microstructures modeled by means of a variationally formulated strain-gradient continuum approach based on micromechanics and show that it can capture microstructural-size-dependent effects. Tension-compression asymmetry of grain-assembly interactions, as well as microscale damage, is taken into account and the continuum scale is linked to the grain-scale mechanisms. Numerical results are provided for finite deformations and substantiate previous research. As expected, results show interesting size-dependent effects that are typical of strain-gradient modeling
On a hemi-variational formulation for a 2D elasto-plastic-damage strain gradient solid with granular microstructure†
No full textWe report a continuum theory for 2D strain gradient materials accounting for a class of dissipation phenomena. The continuum description is constructed by means of a (reversible) placement function and by (irreversible) damage and plastic functions. Besides, expressions of elastic and dissipation energies have been assumed as well as the postulation of a hemi-variational principle. No flow rules have been assumed and plastic deformation is also compatible, that means it can be derived by a placement function. Strain gradient Partial Differential Equations (PDEs), boundary conditions (BCs) and Karush-Kuhn-Tucker (KKT) type conditions are derived by a hemi variational principle. PDEs and BCs govern the evolution of the placement descriptor and KKT conditions that of damage and plastic variables. Numerical experiments for the investigated homogeneous cases do not need the use of Finite Element simulations and have been performed to show the applicability of the model. In particular, the induced anisotropy of the response has been investigated and the coupling between damage and plasticity evolution has been shown
Astronomy Letters, V. 31, I. 12
No full textAstronomy Letters -- December 2005
Volume 31, Issue 12, pp. 787-852
Analysis of the Clustering of 2dFGRS Galaxies Using the Method of a Modified Correlation Gamma Function
A. V. Tikhonov
pp. 787-791 Full Text: PDF (201 kB)
Optical Observations of Type-IIP Supernova 2004dj: Evidence for Asymmetry of the 56Ni Ejecta
N. N. Chugai, S. N. Fabrika, O. N. Sholukhova, V. P. Goranskij, P. K. Abolmasov, and V. V. Vlasyuk
pp. 792-805 Full Text: PDF (457 kB)
Supernova 1987A: The Envelope Mass and the Explosion Energy
V. P. Utrobin
pp. 806-815 Full Text: PDF (297 kB)
An Accretion Disk, a Bipolar Outflow, and an Envelope—a Structure That Accompanies the Formation of a Protostar
L. I. Matveyenko, V. A. Demichev, S. S. Sivakon', Ph. D. Diamond, and D. A. Graham
pp. 816-823 Full Text: PDF (285 kB)
Study of the Apsidal Motion in the Eclipsing Binary MZ Lac
V. S. Kozyreva, A. V. Kusakin, and M. Wolf
pp. 824-831 Full Text: PDF (210 kB)
Manifestation of the 399-Day Variations in Solar Wind Parameters
N. G. Skryabin, V. E. Timofeev, L. I. Miroshnichenko, and S. N. Samsonov
pp. 832-835 Full Text: PDF (150 kB)
Acceleration of Anomalous Cosmic Rays at the Heliospheric Termination Shock
E. G. Berezhko and L. T. Ksenofontov
pp. 836-843 Full Text: PDF (206 kB)
On the Stability of Particular Solutions of the Singly Averaged Hill Problem
M. A. Vashkov'yak and N. M. Teslenko
pp. 844-852 Full Text: PDF (320 kB)Archived web conten
Micro-mechano-morphology-informed continuum damage modeling with intrinsic 2nd gradient (pantographic) grain–grain interactions
No full textIn a previous work, we have shown that a granular micromechanics approach can lead to load path dependent continuum models. In the present work, we generalize such a micromechanical approach introducing an intrinsic 2nd gradient energy storage mechanism (resembling pantographic micromechanism), in the grain–grain interaction. Such a mechanism, represents long-range effects but could also be thought as deriving from the utilization of an actual pantographic connection between two grains in a granular metamaterial. Taking advantage of the homogenization approach developed in previous works, we determine the mechanical behavior of the macro-scale continuum and carry out parametric analyses with respect to the averaged intergranular distance and with respect to the stiffness associated to the pantographic term. We show that with the inclusion of the pantographic term mentioned above, the desired thickness of the localization zone can be modeled and finely tuned successfully. We also show that the complex mechanics of load-path dependency can be predicated by the micromechanical effects and the introduced pantographic term
Plasma Physics Reports V. 31, I. 12
No full textPlasma Physics Reports -- December 2005
Volume 31, Issue 12, pp. 985-1077
TOKAMAKS
Behavior of Small-Scale Density Fluctuations in Discharges with Off-Axis Electron-Cyclotron Resonance Heating in the T-10 Tokamak
D. A. Shelukhin, V. A. Vershkov, and K. A. Razumova
pp. 985-992 Full Text: PDF (119 kB)
On the Ablation Models of Fuel Pellets
V. A. Rozhansky and I. Yu. Senichenkov
pp. 993-1002 Full Text: PDF (109 kB)
MAGNETIC CONFINEMENT SYSTEMS
Particle Confinement in Axisymmetric Poloidal Magnetic Field Configurations with Zeros of B: Methodological Note
V. V. Arsenin and A. A. Skovoroda
pp. 1003-1011 Full Text: PDF (205 kB)
PLASMA OSCILLATIONS AND WAVES
ICR Heating in Ion Separation Systems
A. V. Timofeev
pp. 1012-1028 Full Text: PDF (222 kB)
PLASMA DYNAMICS
Plasma Opening Switch for the MOL Generator
A. A. Altukhov, G. I. Dolgachev, D. D. Maslennikov, A. S. Fedotkin, and I. A. Khodeev
pp. 1029-1038 Full Text: PDF (352 kB)
Neutron Emission Generated in the Collision of Plasma Flows in the Presence of an External Magnetic Field
G. N. Dudkin, B. A. Nechaev, V. N. Padalko, V. M. Bystritsky, V. V Gerasimov, R. V. Kublikov, S. S. Parzhitsky, V. L. Stolupin, J. Vozniak, V. I. Veretel'nik, and É. G. Furman
pp. 1039-1047 Full Text: PDF (188 kB)
BEAMS IN PLASMA
Relativistic Diamagnetic Equilibrium of a Thin-Walled Annular Electron Beam in an External Magnetic Field
A. F. Aleksandrov, M. V. Kuzelev, and A. A. Rukhadze
pp. 1048-1053 Full Text: PDF (88 kB)
PLASMA DIAGNOSTICS
Hilbert–Huang Transform in MHD Plasma Diagnostics
A. M. Kakurin and I. I. Orlovsky
pp. 1054-1063 Full Text: PDF (432 kB)
MAGNETOSPHERIC PLASMA
Configuration of an Inviscid Plasma in the Field of a Rotating Magnetized Central Body
A. O. Soldatkin and Yu. V. Chugunov
pp. 1064-1070 Full Text: PDF (161 kB)
TRANSPORT PROCESSES
Theory of Heat Transport in a Magnetized High-Temperature Plasma
V. Yu. Zaburdaev
pp. 1071-1077 Full Text: PDF (92 kB)Archived web conten
Plasma Physics Reports V. 31, I. 05
No full textPlasma Physics Reports -- May 2005
Volume 31, Issue 5, pp. 347-438
TOKAMAKS
An Analytic Approach to Developing Transport Threshold Models of Neoclassical Tearing Modes in Tokamaks
A. B. Mikhailovskii, M. S. Shirokov, S. V. Konovalov, and V. S. Tsypin
pp. 347-368 Full Text: PDF (240 kB)
PARTICLE ACCELERATION IN PLASMA
Ion Acceleration in a Dipole Vortex in a Laser Plasma Corona
S. V. Bulanov, D. V. Dylov, T. Zh. Esirkepov, F. F. Kamenets, and D. V. Sokolov
pp. 369-381 Full Text: PDF (717 kB)
PLASMA DYNAMICS
Study of X-ray and Neutron Emission in Experiments with Al Wires in an MA Plasma Focus
P. Kubes, J. Kravárik, D. Klír, P. Barvir, M. Scholz, M. Paduch, K. Tomaszewski, I. Ivanova-Stanik, B. Bienkowska, L. Karpinski, L. Juha, J. Krása, M. J. Sadowski, L. Jakubowski, A. Szydlowski, A. Banaszak, H. Schmidt, and V. M. Romanova
pp. 382-391 Full Text: PDF (1089 kB)
DUSTY PLASMA
Helical Structures in Complex Plasma I: Noncollective Interaction
N. G. Gusein-zade and V. N. Tsytovich
pp. 392-411 Full Text: PDF (662 kB)
BEAMS IN PLASMA
Geometry of a Cylindrical Ion Beam in a Radial Magnetic Field at a Low Hall Current
V. P. Shumilin
pp. 412-416 Full Text: PDF (58 kB)
ISOTOPE SEPARATION
Axisymmetric Plasma-Optic Mass Separators
A. I. Morozov and V. V. Savel'ev
pp. 417-424 Full Text: PDF (459 kB)
LOW-TEMPERATURE PLASMA
Experimental and Theoretical Study of a Quasi-Steady Electron-Beam Plasma in Hot Argon
N. L. Aleksandrov, M. N. Vasil'ev, S. L. Lysenko, and A. Kh. Makhir
pp. 425-435 Full Text: PDF (323 kB)
BRIEF COMMUNICATIONS
Ignition of ECR Discharges in a Flaring Magnetic Field
A. V. Timofeev
pp. 436-438 Full Text: PDF (45 kB)Archived web conten
Plasma Physics Reports V. 27, I. 11
No full textPlasma Physics Reports -- November 2001
Volume 27, Issue 11, pp. 907-1000
MAGNETIC CONFINEMENT SYSTEMS
Plasma Convection near the Threshold for MHD Instability in Nonparaxial Magnetic Confinement Systems
V. P. Pastukhov and N. V. Chudin
pp. 907-921 Full Text: PDF (502 kB)
PLASMA OSCILLATIONS AND WAVES
Electromagnetic Oscillations near the Critical Surface in a Plasma: Methodological Note
A. V. Timofeev
pp. 922-931 Full Text: PDF (120 kB)
Distribution of the Absorbed ECRH Power among the Electrons in a Plasma Heated by an Extraordinary Wave
V. L. Erukhimov and V. E. Semenov
pp. 932-937 Full Text: PDF (76 kB)
PLASMA KINETICS
Reduced Models of the Dynamics of Light Impurity Stripping
V. I. Gervids, V. I. Kogan, and D. Kh. Morozov
pp. 938-946 Full Text: PDF (100 kB)
PLASMA DYNAMICS
Generation of K-shell Radiation in a Double Shell Plasma Liner with a Microsecond Current Generator
S. A. Chaikovsky and S. A. Sorokin
pp. 947-952 Full Text: PDF (157 kB)
Current Sheets Formed by Alfvén and Magnetosonic Pulses in the Vicinity of the Null Line of the Magnetic Field
G. I. Dudnikova and V. P. Zhukov
pp. 953-962 Full Text: PDF (171 kB)
K-shell Radiation from Double-Shell Argon Plasma Liners
S. A. Sorokin
pp. 963-966 Full Text: PDF (52 kB)
BEAMS IN PLASMA
Laser Radiation Guiding in a Plasma Channel Created by a Relativistic Electron Beam
A. G. Khachatryan
pp. 967-970 Full Text: PDF (58 kB)
PLASMA DIAGNOSTICS
Small-Angle Scattering of an Extraordinary Wave near the Upper Hybrid Resonance
E. Z. Gusakov and A. V. Surkov
pp. 971-978 Full Text: PDF (100 kB)
LOW-TEMPERATURE PLASMA
Current Dynamics and Mechanisms for the Instability of a Non-Self-Sustained Glow Discharge in Nitrogen
Yu. A. Mankelevich, A. F. Pal', N. A. Popov, T. V. Rakhimova, and A. V. Filippov
pp. 979-989 Full Text: PDF (295 kB)
BRIEF COMMUNICATIONS
Escape of Electron Langmuir Waves from a Magnetized Plasma
A. V. Timofeev
pp. 990-993 Full Text: PDF (53 kB)
Effect of the Radial Electric Field on the Results of Measurements of the Poloidal Rotation of a Tokamak Plasma by Charge Exchange Recombination Spectroscopy
A. N. Romannikov and A. P. Chernobai
pp. 994-996 Full Text: PDF (40 kB)
Dielectric Permittivity of a Plasma in an External Electric Field
V. A. Schweigert[dagger]
pp. 997-999 Full Text: PDF (45 kB)
OBITUARY
In Memory of Vitaly Adol'fovich Schweigert (August 30, 1955–April 3, 2001)
p. 1000 Full Text: PDF (51 kB)Archived web conten
Some aspects of the teachings N. V. Timofeev-Ressovsky on the work «Biosphere and humanity» / D. Mayorchik
No full textСоциальные и экологические проблемы современностиПроблема недостатка биологических ресурсов в связи с перенаселением Земли является одной из важнейших проблем, с которой столкнется человечество в ближайшем будущем. По оценкам ученых, биологические запасы нашей планеты ограничены, Земля может прокормить и снабдить другими видами сырья около 10–12 млрд людей. В труде «Биосфера и человечество» Н. В. Тимофеев-Ресовский рассмотрел эту проблему по трем основным пунктам: «энергетический вход» в биосферу; биологический круговорот биосферы; выход из биологического круговорота в геологию. Рассмотрев все составляющие этой проблемы, Тимофеев-Ресовский пришел к выводу, что мы можем увеличить продуктивность нашей Земли более чем в 10 раз.The problem of lack of biological resources due to overpopulation of the Earth is one of the most important problems that our offspring will face in the near future. Since the biological reserves of our planet are limited, according to modern estimates of scientists, the Earth can feed and supply about 10 to 12 billion people with other types of raw materials. In the work «Biosphere and Humanity», Timofeev–Ressovsky considered this problem in three main points: energy input to the biosphere; biological biosphere circulation; exit from the biological cycle into geology. Having considered all the components of this problem, Timofeev-Resovsky came to the conclusion that we can increase the productivity of our Earth by more than 10 times
JETP Letters V. 65, I .11
No full textleave(s) : ill; 28 cm.JETP Letters -- June 10, 1997
Volume 65, Issue 11, pp. 833-893
Chaotic Rabi vacuum oscillations in cavity quantum electrodynamics
L. E. Kon'kov and S. V. Prants
Full Text: PDF (108 kB)
Boltzmann spectral distribution or "infrared catastrophe" in the resonance radiation of a gas
Yu. K. Zemtsov, A. Yu. Sechin, A. N. Starostin, A. G. Leonov, and D. I. Chekhov
Full Text: PDF (81 kB)
Theory of average pulse propagation in high-bit-rate optical transmission systems with strong dispersion management
S. K. Turitsyn
Full Text: PDF (88 kB)
Resonance tunneling via excited subbands and the existence of a new type of electric-field domains in long-period superlattices
Yu. A. Mityagin, V. N. Murzin, Yu. A. Efimov, and G. K. Rasulova
Full Text: PDF (77 kB)
On low-field electron emission mechanisms
A. A. Dadykin
Full Text: PDF (112 kB)
Critical experiments in the search for fermion condensation
M. V. Zverev, V. A. Khodel', V. R. Shaginyan, and M. Baldo
Full Text: PDF (92 kB)
Low-temperature resistivity of YBa2Cu3O6 + x single crystals in the normal state
V. F. Gantmakher, D. A. Pushin, D. V. Shovkun, G. E. Tsydynzhapov, L. P. Kozeeva, and A. N. Lavrov
Full Text: PDF (102 kB)
Two-dimensional electron gas in double quantum wells with tilted bands
V. B. Timofeev, A. V. Larionov, P. S. Dorozhkin, M. Bayer, A. Forchel, and J. Straka
Full Text: PDF (77 kB)
Determination of the parameters of photoinduced centers in glassy GeS2.2 from the noise spectrum of the optical electroabsorption signal
�. N. Voronkov, S. A. Kozyukhin, and S. A. Khirin
Full Text: PDF (63 kB)
On a classical analog of the isospectral Schr�_dinger problem
V. M. Eleonskii, V. G. Korolev, and N. E. Kulagin
Full Text: PDF (89 kB)The content contained herein is maintained and curated by the Preservation Department.This record is revised and maintained by the content administrators from the Cataloging & Metadata Department
JETP Letters V. 65, I .11
No full textJETP Letters -- June 10, 1997
Volume 65, Issue 11, pp. 833-893
Chaotic Rabi vacuum oscillations in cavity quantum electrodynamics
L. E. Kon'kov and S. V. Prants
Full Text: PDF (108 kB)
Boltzmann spectral distribution or "infrared catastrophe" in the resonance radiation of a gas
Yu. K. Zemtsov, A. Yu. Sechin, A. N. Starostin, A. G. Leonov, and D. I. Chekhov
Full Text: PDF (81 kB)
Theory of average pulse propagation in high-bit-rate optical transmission systems with strong dispersion management
S. K. Turitsyn
Full Text: PDF (88 kB)
Resonance tunneling via excited subbands and the existence of a new type of electric-field domains in long-period superlattices
Yu. A. Mityagin, V. N. Murzin, Yu. A. Efimov, and G. K. Rasulova
Full Text: PDF (77 kB)
On low-field electron emission mechanisms
A. A. Dadykin
Full Text: PDF (112 kB)
Critical experiments in the search for fermion condensation
M. V. Zverev, V. A. Khodel', V. R. Shaginyan, and M. Baldo
Full Text: PDF (92 kB)
Low-temperature resistivity of YBa2Cu3O6 + x single crystals in the normal state
V. F. Gantmakher, D. A. Pushin, D. V. Shovkun, G. E. Tsydynzhapov, L. P. Kozeeva, and A. N. Lavrov
Full Text: PDF (102 kB)
Two-dimensional electron gas in double quantum wells with tilted bands
V. B. Timofeev, A. V. Larionov, P. S. Dorozhkin, M. Bayer, A. Forchel, and J. Straka
Full Text: PDF (77 kB)
Determination of the parameters of photoinduced centers in glassy GeS2.2 from the noise spectrum of the optical electroabsorption signal
É. N. Voronkov, S. A. Kozyukhin, and S. A. Khirin
Full Text: PDF (63 kB)
On a classical analog of the isospectral Schrödinger problem
V. M. Eleonskii, V. G. Korolev, and N. E. Kulagin
Full Text: PDF (89 kB)Archived web conten
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