scholarly journals Method of calculating the parameters of the scraper working equipment of the trench excavator based on critical deep blocked soil cutting

2020 ◽  
pp. 5-12
Author(s):  
Sviatoslav Kravets ◽  
Oleksandr Lukyanchuk ◽  
Vladimir Suponyev ◽  
Olexey Gaponov
Keyword(s):  
Energy Efficient ◽  
Energy Intensity ◽  
Mechanical Characteristics ◽  
Cutting Speed ◽  
Critical Depth ◽  
Modes Of Operation ◽  
Increase Productivity ◽  
Soil Cutting ◽  
Selection Of ◽  
Physical And Mechanical Characteristics

The article presents a method of calculating the parameters of the scraper working equipment of a trench excavator that performs critical depth cutting: critical depth for its cutters, number of cutting lines, pitch of cutters, height of scrapers, cutting speed, working speed, length of plowshares of cutters, necessary effort of cutting of soil, power to drive the working equipment and movement, power selection of the base machine. Methodology/approach. To solve these problems, analytical methods were used to study the parameters of multi-scraper excavators that perform critical depth cutting of soils. Findings. The developed technique allows to create energy-efficient working equipment and to determine its critical-depth modes of operation, which make it possible to increase productivity and reduce the energy consumption of multi-scraper chain trench excavators that carry out blocked cutting of soils. Research limitations/implication. The initial data for the calculation are: the width of the cutters, their cutting angle, the maximum depth of the trench, the width of the trench, the physical and mechanical characteristics of the soil. Originality/value. Managed to achieve the prerequisites for reducing the energy intensity of soil development scraper chain excavators based on critical depth cutting of soils.

INVESTIGATION OF THERMAL AND MATERIAL FIELDS INFL UENCE ON CHANGES OF PHYSICAL AND MECHANICAL CHARACTERISTICS OF CHALK FOR ASSESSMENT OF ITS WORKABILITY

2020 ◽  
Vol 2 (1) ◽  
pp. 247-263
Author(s):  
E.A. ERMOLOVICH ◽  
◽  
A.V. OVCHINNIKOV ◽  
Keyword(s):  
Energy Intensity ◽  
Mechanical Characteristics ◽  
Experimental Studies ◽  
Ultimate Shear Strength ◽  
Rock Destruction ◽  
Low Strength ◽  
Semi Solid ◽  
Increased Strength ◽  
Physical And Mechanical Characteristics

Experimental studies were performed and the dependences of the influence of thermal and material fields on the change in the following physical and mechanical characteristics of the chalk were established: density, the ultimate compressive strength, ultimate tensile strength, ultimate shear strength, elastic modulus, Poisson's ratio, and stickiness. The geomechanical and energy criteria characterizing the chalk workability are calculated: the coefficient of hardness, the indicator of the difficulty of rock destruction, the indicator of the difficulty of rock excavation, the energy intensity of digging and rock destruction. A classification of chalk by workability was developed, in which 5 categories of rocks are distinguished: I -soft chalk, of very low strength; II - dense semi-solid chalk, low strength; III - solid dense chalk of increased strength; IV - solid strong chalk; V - rocky chalk

Cellular Concretes Based on Nanostructured Perlite Binder

2014 ◽  
Vol 496-500 ◽  
pp. 2383-2386 ◽  
Author(s):  
Natalia Viktorovna Pavlenko ◽  
Valeria Valerievna Strokova ◽  
Alla Vasilievna Cherevatova ◽  
Daria Dmitrievna Netsvet ◽  
Evgeniy Vladimirovich Miroshnikov
Keyword(s):  
Mechanical Characteristics ◽  
Foam Concrete ◽  
Technological Parameters ◽  
Mechanisms Of Formation ◽  
Amorphous Aluminosilicate ◽  
Selection Of ◽  
Physical And Mechanical Characteristics

The article is devoted to the characteristics of foam concrete with the application of nanostructured binder (NB) on the basis is amorphous aluminosilicate rocks. The optimal technological parameters of the production of nanostructured perlite binder (NPB) were stated. The selection of foam generating agents was accomplished and mechanisms of formation of cellular composites on the basis of NPB were studied. Physical and mechanical characteristics of the obtained material were determined.

scholarly journals Geonics (geomimetics) and search for optimal solutions in building materials science

2021 ◽  
Vol 18 (1) ◽  
pp. 120-134
Author(s):  
V. S. Lesovik ◽  
A. А. Sheremet ◽  
I. L. Chulkova ◽  
A. E. Zhuravleva
Keyword(s):  
Building Materials ◽  
Mechanical Characteristics ◽  
Materials Science ◽  
Raw Materials ◽  
Construction Materials ◽  
Kursk Magnetic Anomaly ◽  
Transdisciplinary Approach ◽  
Methodological Approaches ◽  
Selection Of ◽  
Physical And Mechanical Characteristics

Introduction. Methodological approaches and validation of the emergence of a new transdisciplinary area -geonics, which is considered as the art of applying knowledge of the inorganic world, are presented.Materials and methods. The concept of technogenic metasomatism as a stage in the evolution of building materials, characterized by the adaptation of the composite to changing conditions is formulated. The Law of affinity of structures, which consists in the selection of raw materials for a composite with similar physical and mechanical characteristics, is described.Results. The examples of non-traditional raw materials use in the areas of construction materials science (intelligent composites, restoration mixtures) and architecture (the building of the Belarusian Potash Company in Belarus, the 'Reflection of the mineral’ building in Japan, the design concept of the monument to the Kursk magnetic anomaly) are presented.Discussion and conclusions. It is proved that the development of a transdisciplinary approach to geonics will improve the comfort of human stay in the environment.

Verification Test of Energy-Efficient Driving by Selection of Braking Notches

2014 ◽  
Vol 134 (12) ◽  
pp. 1022-1030 ◽  
Author(s):  
Tomoyuki Ogawa ◽  
Kazumasa Kumazawa ◽  
Noriaki Sugita ◽  
Yoichi Imamura ◽  
Shingo Minobe ◽  
...  
Keyword(s):  
Energy Efficient ◽  
Verification Test ◽  
Selection Of

BENCH DESIGN AND STUDY OF PHYSICAL AND MECHANICAL CHARACTERISTICS OF A TEAT CUP LINER WITH ANTIBACTERIAL FILLER

2020 ◽  
pp. 22-26
Author(s):  
YURY G. IVANOV ◽  
◽  
YELENA V. MASHOSHINA ◽  
LYUDMILA N. VERLIKOVA ◽  
DARIA G. GELETIY ◽  
...  
Keyword(s):  
Mechanical Characteristics ◽  
Physical And Mechanical Characteristics

Discharge-pulse Geotechnical Electro Discharge Technology of Bases Strengthening

2020 ◽  
Vol 787 (12) ◽  
pp. 63-65
Author(s):  
N.S. Sokolov
Keyword(s):  
Bearing Capacity ◽  
Mechanical Characteristics ◽  
Discharge Pulse ◽  
Zero Values ◽  
Traditional Technologies ◽  
Negative Friction ◽  
Geotechnical Problems ◽  
Physical And Mechanical Characteristics

The problem of increasing the bearing capacity of the base is an relevant problem in modern geotechnical construction. When significant loads are transmitted to the base, the use of traditional technologies is not always justified. Often there is an urgent need to use non-standard ways to strengthen the bases. In many cases, the geotechnical situation is aggravated by the presence of weak underlying layers with unstable physical and mechanical characteristics in engineering-geological sections. When strengthening such bases with the help of traditional piles, the latter can get negative friction, which significantly reduces their bearing capacity on the ground, sometimes reaching zero values. This may lead to additional precipitations of the objects being constructed and constructed in the zone of geotechnical influence. The use of ERT piles in most cases successfully solves many complex geotechnical problems.

Marker-assisted identification of potential fertility restorers for the development of three-line hybrids in rice (Oryza sativa L.)

2020 ◽  
Vol 57 (3) ◽  
pp. 181-189
Author(s):  
Asma Majid ◽  
GA Parray ◽  
NR Sofi ◽  
Gazala H Khan ◽  
Showkat A Waza ◽  
...  
Keyword(s):  
Oryza Sativa L ◽  
Chromosome 1 ◽  
Limiting Factor ◽  
Kashmir Valley ◽  
Fertility Restorer ◽  
Yield And Quality ◽  
Restorer Genes ◽  
Increase Productivity ◽  
Fertility Restorers ◽  
Selection Of

Rice being a staple food crop of Kashmir valley, the focus is on enhancement of yield in order to meet the needs of ever-growing population.Identification of new parental lines is crucial for developing ecology-specific hybrids with ideal agronomic performance. Exploitation of heterosis in the form of hybrid rice technology can be one of the approaches to increase productivity in this crop, especially exploiting diversity among japonica lines can serve as an excellent route.A number of CMS lines suitable formountainous areas of Kashmir have been developed, however, the availability of promising restorer lines remains to be the major limitation for utilization of these lines.Identification of potential restorers acts as the main limiting factor for hybrid development in the Kashmir valley. Marker based screening for Rf3 and Rf4 fertility restorer genes can be helpful in rapid selection of restorer lines while dealing with the large quantity of genetic materials. In the present study, 100 rice germplasm were screened with the help of SSR markers, RM3148 and RM6100linked to Rf3 and Rf4 genes on chromosome 1 and 10, respectively. In total, 19 lines revealed the presence of both Rf3 and Rf4 genes. These lines amplified fertility restorer specific alleles for both the genes and may serve as potential restorers for obtaining heterotic rice hybrids. Further the germplasm lines were also evaluated for yield and quality traits.The present results would help in selection of suitable restorers along with preferred grain shape/size.

Stress deformed state of a drill string under off-design conditions

2006 ◽  
Vol 4 ◽  
pp. 68-72
Author(s):  
A.G. Khakimov ◽  
Z.Z Sharafutdinov
Keyword(s):  
Mechanical Characteristics ◽  
Drill String ◽  
Modes Of Operation ◽  
Deformed State

The paper gives a methodology for calculating the drill string performance under off-design conditions, including the passage through the interface separating rocks with very different physico-mechanical characteristics, drilling of boulder rocks, and dynamic modes of operation. One of the mechanisms of the destruction of drill string elements and roller cutters is revealed.

Promising hybrid fabrics based on carbon and aramid fibers as a reinforcing filler for polymer composites

2019 ◽  
pp. 86-95 ◽  
Author(s):  
G. F. Zhelezina ◽  
V. G. Bova ◽  
S. I. Voinov ◽  
A. Ch. Kan
Keyword(s):  
Composite Material ◽  
Polymer Composites ◽  
Carbon Fibers ◽  
Mechanical Characteristics ◽  
High Strength ◽  
High Modulus ◽  
Hybrid Composite Material ◽  
Hybrid Fabric ◽  
Reinforcing Filler ◽  
Physical And Mechanical Characteristics

The paper considers possibilities of using a hybrid fabric made of high-modulus carbon yarn brand ZhGV and high-strength aramid yarns brand Rusar-NT for polymer composites reinforcement. The results of studies of the physical and mechanical characteristics of hybrid composite material and values of the implementation of the strength and elasticity carbon fibers and aramid module for composite material are presented. 

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