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  • 1
    Call number: AWI G3-23-95327
    Description / Table of Contents: Настоящая работа является продолжением монографии "Тектоничеекое строение Якутекой АССР", написанной этим же коллективом автором и изданной в 1964 г. В отличие от указанной работы в наотоящей основное внимание обращено на глубинное строение земной коры, недоступное в большинстве случаев для исследований о6ычными геологическими методами. В монографии приведена схема рельефа кристаллического основания, охнатывающая восточную часть Сибирской платформы и южную половину Верхояно-Чукотской складчатой области. Для этой же территории даны схемы рельефа поверхностей Конрада и Мохоровичича. Подробно изложена методика построений указанных поверхностей раздела земной коры. Рассмотрено строение основных структурных элементов чехла и их соотношение с глубинным строением. Впервые на рассматриваемой территории глубинные разломы систематизированы по возрасту и глубине заложения, дано их подробное орисание. С учетом новых геолого-геофизических данных рассмотрена история тектонического развития территории Якутии в докембрии, нижнем и среднем палеозое.
    Description / Table of Contents: Translation of the abstract: This work is a continuation of the monograph "Tectonic Structure of the Yakutek ASSR" written by the same group of authors and published in 1964. In contrast to this work, the main attention is paid to the deep structure of the earth's crust, which is inaccessible in most cases for studies by conventional geological methods. The monograph presents a relief scheme of the crystalline base covering the eastern part of the Siberian Platform and the southern half of the Verkhoyansk-Chukotka folded region. For the same territory, the relief schemes of the Konrad and Mohorovichic surfaces are given. The technique for constructing the indicated interfaces of the earth's crust is described in detail. The structure of the main structural elements of the cover and their relationship with the deep structure are considered. For the first time in the territory under consideration, deep faults are systematized by age and depth of occurrence, and their detailed description is given. Taking into account new geological and geophysical data, the history of the tectonic development of the territory of Yakutia in the Precambrian, Lower and Middle Paleozoic is considered.
    Type of Medium: Monograph available for loan
    Pages: 170 Seiten , Illustrationen
    Language: Russian
    Note: In kyrillischer Schrift
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Strength of materials 8 (1976), S. 928-932 
    ISSN: 1573-9325
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. The dependence of the growth rate of a fatigue crack on the stress intensity coefficient at the tip of the crack is described by an exponential function of the da/dN=CΔKn type for all zones of a welded joint. For a given applied stress and realizable values of ΔK the index n in this function has a constant value, differing for each particular zone. 2. The instantaneous and average crack velocities reach their maximum values in the heat-affected zone and their lowest values in the seam metal. The crack growth rate in the parent metal is close to that in the heat-affected zone. 3. The fatigue life of a weld subjected to cyclic (fatigue) loading may to a first approximation be estimated by the n and C values of the parent metal.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Strength of materials 6 (1974), S. 490-494 
    ISSN: 1573-9325
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. It was shown that in the case of a test piece with a stress concentrator in the form of a central hole the ratio of the period of fatigue crack generation to the period of its development depended on the stress level. The closer the stress is to the fatigue limit, the greater the proportion of total test piece life attributable to the period of crack generation. 2. It was confirmed that the relationship between the speed of crack propagation and the stress intensity factor at the tip of the crack was well described by a power function in the form ϖa/ϖN=CΔkm. 3. A comparison of experimental data on the relationship between crack propagation speed and the range of the stress intensity factor for essentially different steels and alloys obtained under various experimental conditions indicates the possibility of broad generalizations on this pattern.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Strength of materials 7 (1975), S. 701-705 
    ISSN: 1573-9325
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. During fatigue tests, the loading frequency exerts a marked effect on the overall longevity-the average increase in cycles to failure at all levels of nominal stress was about 60% with an increase in cycle frequency from 260 to 1000 cycles/min. 2. The loading frequency also affects the rate of fatigue-macrocrack propagation, particularly at the outset of crack propagation. The rate of crack propagation diminishes with increasing loading frequency. 3. In the step function vcr=CΔKn describing the relationship between the rate of crack propagation and the stress-concentration factor, the parameters C and n are dependent on loading frequency. The coefficient C diminishes, and the value of n increases with increasing loading frequency; in this case, the intensity of the relationship vcr=f(ΔK) also increases. 4. The parameters C and n are linear functions of the level of applied stress; in this case, the loading frequency does not affect the intensity of this relationship.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Strength of materials 7 (1975), S. 946-950 
    ISSN: 1573-9325
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions Plastic deformation of steel 1Kh14N18V2BR1 (ÉI726) at high temperatures under conditions where the effect of this treatment is retained not only increases the ultimate tensile strength and creep resistance but also substantially increases the fatigue strength at elevated temperatures.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Metal science and heat treatment 20 (1978), S. 160-162 
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Metal science and heat treatment 28 (1986), S. 205-209 
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. The use of stresses close to the yield point under programmed and cyclic loading of the samples does not show a significant influence on the kinetics of crack growth during the next small loading. This supports the hypothesis of a linear accumulation of damage at the failure stage. 2. A fatigue crack in a sample with a sharp notch initially develops from many separate microcracks which merge into one general front advancing to the center of the sample. 3. Under small nominal stresses the greater part of the fatigue failure surface of austenitic steel 12Kh18N9T has a "wavelike" form with a radial arrangement of separate waves. The fatigue grooves whose direction is across the cracks develop in samples of this steel only close to the terminal surface region. 4. In ferrite—pearlite steels the "wavelike" structure is not observed, but a "fibrous" structure arises which appears in the early stages of failure as sharply outlined crests. The direction of the fibrous relief is with the orientation of the separate grains. The displacement of the fibers in the separate grains varies. 5. The formation of a fibrous structure during fatigue failure and the secondary system of cracks could possibly be connected with the presence of a radial stress at the apex of the crack.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Metal science and heat treatment 15 (1973), S. 707-709 
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. The strength of alloy KhN40MDTYu (ÉP 543) can be increased substantially by high-temperature plastic deformation with final rolling temperatures at which no recrystallization occurs and aging (treatment I) or plastic deformation (10–20%) at room temperature with subsequent aging (treatment II). Treatment I is more effective. 2. Treatment I substantially increases the strength, with retention of fairly high ductility and impact strength. The fatigue strength increases approximately 100% as compared with the original quenched condition and can be additionally increased by surface hardening — shotpeening in particular. 3. Treatment II increases the strength but greatly reduces the ductility and impact strength at all degrees of deformation tested. In this case there is an optimal degree of deformation (10–20%) at which the fatigue strength reaches its maximum value. Aging increases the strength after prior deformation of 15–20%, but lowers the strength after larger deformations.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Radiophysics and quantum electronics 21 (1978), S. 114-117 
    ISSN: 1573-9120
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
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