Аналитическое решение задачи о больших прогибах жесткопластической защемленной балки под действием локальной распределенной нагрузки, опорных моментов и продольной силы

In the work up the technique of the decision of problems about the large deflections of beams from ideal hard-plastic material, with various kinds of fastening, for want of action of the asymmetrically distributed loads with allowance for of preliminary stretching-compression is developed. The developed technique is applied for research of the strained-deformed condition of beams, and also for calculation of a deflection of beams with allowance for of geometrical nonlinearity.Разработана методика решения задач о больших прогибах балок из идеального жесткопластического материала, с различными видами закрепления, при действии несимметрично распределенных нагрузок с учетом предварительного растяжения-сжатия. Разработанная методика применена для исследования напряженно-деформированного состояния однопролетных балок, а также для вычисления прогиба балок с учетом геометрической нелинейности

БОЛЬШИЕ ПРОГИБЫ ИДЕАЛЬНО ПЛАСТИЧЕСКОЙ ЗАЩЕМЛЕННОЙ И ШАРНИРНО-НЕПОДВИЖНОЙ БАЛКИ ПОД ДЕЙСТВИЕМ СОЧЕТАНИЯ НАГРУЗОК

In the article the technique of solving the problems of large deflections of the beams from the ideal rigid-plastic material under the influence of asymmetrically distributed loads, with account of pretension or pre compression. The developed method was applied to the study of stress-strain state of single-span beams, as well as for the calculation of the limit load for the beams.В статье разработана методика решения задач о больших прогибах балок из идеального жесткопластического материала при действии несимметрично распределенных нагрузок с учетом предварительного растяжения-сжатия. Разработанная методика применена для исследования напряженно-деформированного состояния однопролетных балок, а также для вычисления предельной нагрузки балок. Данная работа является продолжением статьи Монахова И.А., Басова Ю.К. «Аналитическое определение несущей способности балки с одной защемленной и другой шарнирно-неподвижной опорами под действием сочетания нагрузок» (Вестник Российского университета дружбы народов. Серия: Инженерные исследования. 2015. № 1)

A Real Space Description of Magnetic Field Induced Melting in the Charge Ordered Manganites: I. The Clean Limit

We study the melting of charge order in the half doped manganites using a model that incorporates double exchange, antiferromagnetic superexchange, and Jahn-Teller coupling between electrons and phonons. We primarily use a real space Monte Carlo technique to study the phase diagram in terms of applied field $(h)$ and temperature $(T)$, exploring the melting of charge order with increasing $h$ and its recovery on decreasing $h$. We observe hysteresis in this response, and discover that the `field melted' high conductance state can be spatially inhomogeneous even without extrinsic disorder. The hysteretic response plays out in the background of field driven equilibrium phase separation. Our results, exploring $h$, $T$, and the electronic parameter space, are backed up by analysis of simpler limiting cases and a Landau framework for the field response. This paper focuses on our results in the `clean' systems, a companion paper studies the effect of cation disorder on the melting phenomena.Comment: 16 pages, pdflatex, 11 png fig

Electrical conductivity of ladle and synthetic slags

22.00; Translated from Russian (Izv. Vyssh. Uchebn. Zaved., Chern. Metall. 1988 (5) p. 5-8)Available from British Library Document Supply Centre- DSC:9022.06(BISI-Trans--26871)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Heat flow in the Alboran Sea, western Mediterranean

The results of the first regional heat flow survey carried out in the Alboran Basin are presented. The survey consists of 98 heat flow measurements obtained using a violin type probe, 697 nautic miles of gravity profiles, 1446 nautic miles of bathymetric survey, and 22 gravity cores. A remarkable difference in heat flow patterns exists between the western (WAB) and eastern (EAB) parts of the Alboran Basin. The average heat flow in the WAB is 69 ± 6 mWm-2 with a generally increasing trend towards the centre and to the east. In contrast, the heat flow pattern in the EAB shows an average value of 124 ± 8 mWm-2 and it is maintained rather constant for the overall area. Superimposed on this general pattern there are some local thermal anomalies, associated with hydrothermal activity, which have been detected in the central WAB (up to 123 mWm-2), in the South Alboran Basin (SAB) (up to 153 mWm-2) and in the Djibouti Bank (DB) (up to 254 mWm-2). After corrections for thermal refraction, sedimentation and cooling of volcanic bodies, the resulting heat flow distribution in the WAB is smoother, but still shows the increasing trend towards the centre and to the east. In the EAB, the application of these corrections did not lead to any noticeable changes. A 1-D approach that combines heat flow data, crustal structure and elevation shows a dramatic decrease in lithospheric thickness from the WAB (50-90 km) to the EAB (38-40 km). Likewise, the resulting crustal thickness is around 14-16 km in the central part of the WAB, increasing towards the borders of the basin, whereas in the EAB the crustal thickness varies between 12.5 and 14.5 km in its western part, and between 10 and 11.5 km in its eastern part

The biodiversity of the deep Southern Ocean benthos

Our knowledge of the biodiversity of the Southern Ocean (SO) deep benthos is scarce. In this review, we describe the general biodiversity patterns of meio-, macro- and megafaunal taxa, based on historical and recent expeditions, and against the background of the geological events and phylogenetic relationships that have influenced the biodiversity and evolution of the investigated taxa. The relationship of the fauna to environmental parameters, such as water depth, sediment type, food availability and carbonate solubility, as well as species interrelationships, probably have shaped present-day biodiversity patterns as much as evolution. However, different taxa exhibit different large-scale biodiversity and biogeographic patterns. Moreover, there is rarely any clear relationship of biodiversity pattern with depth, latitude or environmental parameters, such as sediment composition or grain size. Similarities and differences between the SO biodiversity and biodiversity of global oceans are outlined. The high percentage (often more than 90%) of new species in almost all taxa, as well as the high degree of endemism of many groups, may reflect undersampling of the area, and it is likely to decrease as more information is gathered about SO deep-sea biodiversity by future expeditions. Indeed, among certain taxa such as the Foraminifera, close links at the species level are already apparent between deep Weddell Sea faunas and those from similar depths in the North Atlantic and Arctic. With regard to the vertical zonation from the shelf edge into deep water, biodiversity patterns among some taxa in the SO might differ from those in other deep-sea areas, due to the deep Antarctic shelf and the evolution of eurybathy in many species, as well as to deep-water production that can fuel the SO deep sea with freshly produced organic matter derived not only from phytoplankton, but also from ice algae