Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "strain stress" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 189
Tytuł:
Локальная устой чйвость плоскйх многограннйков сетчатых куполов
Local stability of flat polyhedrons of mesh domes
Autorzy:
ДРАГАН, В. И.
ГЛУШКО, К. К
Powiązania:
https://bibliotekanauki.pl/articles/1203945.pdf
Data publikacji:
2016
Wydawca:
Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
Tematy:
stress-strain state
fragment
mesh dome
Opis:
The dependences for determining the stress-strain state of a fragment of a mesh dome. These formulas are valid for the case of constant-largest hub load on a mesh dome. Experimentally determined tense and strained state of the dome fragment. The proposed method has a good agreement with the experimental results.
Źródło:
Modern Engineering; 2016, 1; 82-93
2450-5501
Pojawia się w:
Modern Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of the stress-strain state of a rope strand with linear contact under tension and torsion loading conditions
Autorzy:
Kalentev, E.
Václav, S.
Božek, P.
Tarasov, V.
Korshunov, A.
Powiązania:
https://bibliotekanauki.pl/articles/102692.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
numerical analysis
stress-strain state
rope
Opis:
The paper presents the results of a numerical analysis of the stress-strain state of a rope strand with linear contact under tension and torsion loading conditions. Calculations are carried out using the ANSYS software package. Different approaches to calculation of the stress-strain state of ropes are reviewed, and their advantages and deficiencies are considered. The analysis of the obtained results leads us to the conclusion that the proposed method can be used in engineering calculations.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 2; 231-239
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermoelastic strain and stress fields due to a spherical inclusion in an elastic half-space
Autorzy:
Singh, K.
Muwal, R.
Powiązania:
https://bibliotekanauki.pl/articles/281796.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
uncoupled thermoelasticity
strain and stress fields
potential functions
spherical inclusion
Opis:
In this paper, closed form analytical expressions for thermoelastic strain and stress components due to a spherical inclusion in an elastic half-space are obtained. These expressions are derived in the context of steady-state uncoupled thermoelasticity using thermoelastic displacement potential functions. The thermal strain and stress fields are generated due to differences in the coefficients of linear thermal expansion between a subregion and the surrounding material. The strain and stress components for exterior points of the spherical inclusion are same as those of the center of dilatation. Variations of strain and stress components for exterior and interior points of the spherical inclusion are shown graphically.
Źródło:
Journal of Theoretical and Applied Mechanics; 2017, 55, 4; 1369-1380
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Partial cases of stressed-deformed condition of casing and pump compressor pipes
Autorzy:
Vasylyshyn, Vitalii
Taras, Iryna
Bekish, Iryna
Kornuta, Olena
Kornuta, Volodymyr
Powiązania:
https://bibliotekanauki.pl/articles/409894.pdf
Data publikacji:
2020
Wydawca:
STE GROUP
Tematy:
tubing
stress-strain state
fatigue life
tightening torque
Opis:
Threaded joints are the most technological for piling up in the fields. However, violations of standard threaded joints account for 70% of all complications in pipe processing and production. These malfunctions result in significant material losses, reduced well productivity, and contamination of the wells and environmental pollution. Particularly acute is the loss of these sealed joints during exploration and development of gas and gas condensate fields. The necessary increase in volumes and intensification of hydrocarbon energy production is envisaged by the increase of drilling depth, construction of slopes and horizontal wells. Horizontal drilling and fracturing are used to produce shale gas. The efficiency and safety of the operation of oil and gas wells in complex mining and technical conditions depend on the quality and reliability of casing and pumping columns, which requires the modernization of machinery and technology for the installation of wells. The most technological for column fitting in the fisheries sector is threaded joints. However, breach of standard threaded connections causes 70% of all complications with pump housings and columns. This leads to significant material losses, reduced production of raw materials, contamination of the interior and the environment. Therefore, the urgent task is to improve the threaded joints by increasing their reliability and efficiency under heavy workloads.
Źródło:
Management Systems in Production Engineering; 2020, 2 (28); 97-103
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stress-strain model study of ferrous tailing concrete short column restraint by hooping
Autorzy:
Li, Sujuan
Kang, Hongzhen
Powiązania:
https://bibliotekanauki.pl/articles/972321.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
ferrous tailing
restraint concrete
short column
stress-strain model
Opis:
This study analyzed the stress–strain curve of stirrup restraint ferrous tailing concrete by test and theoretical analysis. Twenty short column in strength grade 5 are used in the test with WC30, WC35, WC40, WC45 and WC50. The stress–strain data is achieved after the axial compression behavior test. It is found from the stress–strain curve that the stress–strain relationship is similar with natural sand concrete. Moreover, the whole stress–strain curve equation of stirrup restraint ferrous tailing concrete is put forward. The calculation results show that the data calculating by the equation are in good agreement with the experimental data.
Źródło:
Mining Science; 2019, 26; 241-248
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of the stress-deformed state and cracking inreinforced concrete structures using ANSYS Mechanical
Autorzy:
Dorofeev, V. S.
Karpyuk, V. M.
Neutov, O. S.
Neutov, S. F.
Powiązania:
https://bibliotekanauki.pl/articles/950449.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
concrete beam
stress-strain state
finite element modeling
ANSYS
Opis:
The article presents the results of reinforced concrete beams modeling under short-term loading with the use of the ANSYS Mechanical software. The obtained parameters were compared with the experimental ones. The comparison showed a satisfactory concordance of the parameters. In case of the discrepancies, the authors suggest that they are due to the idealization of material properties and structural model of the finite method. The paper is divided into the following chapters: Introduction, Literature Review, Research Significance, Element Types, Real Constants, Material Properties Modeling, Geometric Modeling, Loads and Boundary Conditions, Cracking and Failure and Conclusions. Each of the five conclusions in the last chapter offers a summary of the presented experimental research.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2014, 17(2); 105-121
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Friction heating and stress-strain state of ventilated disc brakes
Autorzy:
Holenko, Kostyantyn
Dykha, Oleksandr
Babak, Oleg
Posonskiy, Sergiy
Powiązania:
https://bibliotekanauki.pl/articles/2204250.pdf
Data publikacji:
2023
Wydawca:
Fundacja Centrum Badań Socjologicznych
Tematy:
brake discs
thermal load
stress-strain state
safety
stress
heat flow
Opis:
This paper describes the study of ventilated car disc brakes stress-strain conditions and friction under the pressure using the ANSYS environment. Such influencing factors are taken into account in the course of research as angular speed value, the pressure of the pads on the disk, the nature of the load application, convection, thermal expansion, etc. Computer modelling of the stress field and the transient thermal field in the area of contact between the pads and the disk is provided by the method of sequential thermostructural communication of the intermediate states of the brake model directly in the ANSYS Coupled Field Transient environment. Besides, the ANSYS calculations were also performed based on the primitive assembly model of two steel blocks (the discrepancy was less than 3%) to determine the identity of the theoretical knowledge about the heating of bodies as a result of the work to overcome frictional forces. Finally, a high level of calculation results convergence by analytical formulas and computer modelling was established. Since this approach justified itself, its principles were taken as a basis in the calculations of ventilated disc brakes of cars, which significantly facilitates their application, knowing the area of the active part of the disc (the rest of the boundary conditions are typical and correspond to the normal operating modes of the vehicle).
Źródło:
Journal of Sustainable Development of Transport and Logistics; 2023, 8, 1; 43--52
2520-2979
Pojawia się w:
Journal of Sustainable Development of Transport and Logistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FEM simulation of the tube rolling process in Diescher’s mill
Autorzy:
Pater, Z.
Tofil, A.
Powiązania:
https://bibliotekanauki.pl/articles/102656.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
tube rolling
FEM
state of stress and strain
Opis:
This paper deals with the issue of numerical modelling of the piercing process of a thick–walled bush in a two-rolled skew rolling mill, equipped with guiding devices of Diescher’s type. After a short characteristic of the subject matter, the developed geometric model of the process was discussed, with taking kinematics of tools movement and thermal phenomena present in metal during forming into consideration. Next, the results of calculations were presented in a form of fields of strain, damage criterion and temperature. Distributions of force parameters acting on particular tools during the process of bush rolling were also given.
Źródło:
Advances in Science and Technology. Research Journal; 2014, 8, 22; 51-55
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocenka deformirujemosti zagotovok v processe valcovki
Estimation of deformability billets during rolling
Autorzy:
Gun'ko, I.
Dobranuk, Y.
Powiązania:
https://bibliotekanauki.pl/articles/78062.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
stress-strain state
cylindrical billet
stress state parameter
deformability
rolling
trajectory deformation
Opis:
Forming analyzed and solved the problem of determining the stress-strain state of a cylindrical billet during rolling using simulation in the software package DEFORM 3D. Patterns of forming and distribution of the accumulated damages to the billet during deformation is received. A study of dangerous, in terms of damage accumulation, points billet is performed. For this it was constructed and analyzed the trajectory of deformation at these points of the billet.
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 4
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural response of multilayered aluminum and steel specimens subjected to high strain rate loading conditions
Autorzy:
Iqbal, D.
Tiwari, V.
Powiązania:
https://bibliotekanauki.pl/articles/279557.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
dynamic stress strain behaviour
multilayering
pulse shaper
finite element simulation
Opis:
Series of experiments and a detailed computational analysis has been performed to investigate the high strain rate behaviour of homostacked Al 6063-T6 and IS 1570 alloys. Split Hopkinson pressure bar technique was utilized to study the effect of high rate loading on the stress strain relationship of single, double, tri and quad layered/stacked specimens. Three different specimen aspect ratios 1, 0.75 and 0.5 were also evaluated for different strain rates. A 2 mm thick pulse shaper was employed in achieving dynamic stress equilibrium, a near constant strain rate and a high rise time as per requirements. After analyzing the results from the experiments it was observed that single and halved specimens showed a close match in both the elastic and plastic regions for aluminium alloy as well as for steel. In the case of Al 6063-T6, a nearly bi-linear nature of the constitutive curve was observed for single and halved specimens, which transformed into near tri-linear nature for tri and quad stacked specimens. The dynamic numerical analysis showed a good agreement between the numerical and experimental results for a single and halved specimen in the case of Al alloy. For steel, a close correlation was observed for all the four cases.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 4; 1139-1151
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geomechanical substantiation of parameters of technology for mining salt deposits with a backfill
Autorzy:
Rybak, Jarosław
Tyulyaeva, Yulia
Kongar-Syuryun, Cheynesh
Khayrutdinov, Albert M.
Akinshin, Ivan
Powiązania:
https://bibliotekanauki.pl/articles/2016528.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
geotechnology
backfilling operation
rock mass
mathematical modeling
stress-strain behavior
Opis:
The analysis of the technogenic impact of mining on the environment was carried out. A transition to geotechnology with backfill is proposed in order to reduce the impact of mining operations. The paper presents the results of research aimed at finding the parameters of the technology for mining salt deposits with backfill and the determination of the backfilling influence on the dynamics of deformation of the undermined rock mass. The results of studies on the qualitative and quantitative assessment of the rock mass behavior (by the finite element method with the use of the FLAC3D software), extracted by the harvesters, are given. The research shows the influence of mining on the mass, changes in the maximum stresses during the cementing of the paste backfill in the stopes. It is recommended to use this approach in geotechnical assessment of the rock mass behavior in the conditions of using development systems of various classes.
Źródło:
Mining Science; 2021, 28; 19-32
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of fracture processes in Silesian Carboniferous sandstones
Autorzy:
Łukaszewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/2059621.pdf
Data publikacji:
2003
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
fracture process
relation stress-strain
acoustic emission
post-failure stage
Opis:
The development of fracture processes in selected Carboniferous rocks from the Upper Silesian Coal Basin is described, with particular regard to the behaviour of rock specimens in the post-failure stage. The fracture processes were monitored using the stress-strain relations, coupled with acoustic emission, recorded during loading. Energy accumulation and dissipation phenomena were observed during rock loading. Cracking was recorded on the stress-strain curves as deformation loops, accompanied by significant stress decreases, and as cyclic increases in acoustic emission activity. Observing and analysing stages of high acoustic emission and stress drops enabled determination of three ways ("schemes") in which fracture originated and developed during the post-critical stage. Scheme I is damage and movement of grains and rock cement, scheme II is destruction of single rock grains of particular resistance, and scheme III is a dislocational and slide deformation of the rock medium.
Źródło:
Geological Quarterly; 2003, 47, 1; 29-38
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of increasing mining rate on longwall coal mining – Western Donbass case study
Autorzy:
Sdvyzhkova, O.
Patyńska, R.
Powiązania:
https://bibliotekanauki.pl/articles/178393.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
rock
stress-strain state
mining rate
failure criterion
roof collapse
Opis:
This paper presents the problems associated with the rapid change of the rock stress-strain state in terms of increasing the rate of coal mining. Parameters of the roof collapse are determined depending on the rate of a longwall advancing under conditions of poor rocks. Statistical data are processed to obtain a general trend concerning the mining rate impact on the roof collapse. The statistical strength theory is applied to explain the increase in mined-out space and the size of hanging roof behind a coal face. Numerical simulation is carried out to determine a critical size of mined-out space that provokes a roof collapse. The area of yielded rocks is outlined using the criterion developed taking into account the rate of longwall advancing. A general regularity is obtained to determine the roof collapse parameters. The developed technics gives a possibility to predict the moment of general roof collapse at the initial stage of longwalling to prevent the negative effect of the rapid stress redistribution provoking joints propagation and intensive gas release. The estimation of the rock stress-strain state considering the rate of mining operations can be useful for tasks related to a new technology implementation. The statistical strength theory and failure criterion applied together provides adequate planning of mining activities and the assessment of natural hazards.
Źródło:
Studia Geotechnica et Mechanica; 2016, 38, 1; 91-98
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Acoustic Emission Data Acquired During Tensile Deformation of Maraging Steel M250 Welded Specimens
Autorzy:
Wuriti, Gowri Shankar
Chattopadhyaya, Somnath
Krolczyk, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/176765.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
maraging steel M250 grade
AE
Acoustic Emission
stress strain
Opis:
Safety and reliability are primary concerns in launch vehicle performance due to the involved costs and risk. Pressure vessels are one of the significant subsystems of launch vehicles. In order to have minimal weight, high strength material viz. maraging steel M250 grade is used in realizing the pressure vessel casing hardware. Despite the best efforts in design methodology, quality evaluation in production and effective structural integrity assessment is still a farfetched goal. The evolution of such a system requires, first, identification of an appropriate technique and next its adoption to meet the challenges posed by advanced materials like maraging steels. In fact, a quick survey of the available Non-Destructive Evaluation (NDE) techniques suggests Acoustic Emission (AE) as an effective structural integrity assessment tool capable of identifying any impending failure or degradation at an earlier stage. Experience shows that the longitudinal welds in the pressure vessels are quite vulnerable to failure due to the fact that they experience the maximum stress (i.e. hoop stress). Loading welded tensile samples are quite synonymous to the hoop stress experienced by longitudinal welds. An attempt is made to compare the Acoustic Emission data acquired during tensile deformation of maraging steel welded specimens. A total of 16 welded specimen’s with known defects were studied for their tensile behaviour is in connection with Acoustic Emission data. The lowest failure load was 70.5 kN and the highest being 84.8 kN. AE activity graphs viz. cumulative AE activity, hit rate, energy rate, count rate, AE amplitude history, AE count history, AE energy history, amplitude-count correlation and hit amplitude distribution have been investigated and salient features with respect to the data have been critically studied and relevant correlations are arrived at.
Źródło:
Archives of Acoustics; 2020, 45, 2; 221-231
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chislennoe reshenie kontaktnojj zadachi naprjazhenno-deformirovannogo sostojanija tel pri rabote stalnykh kanatnogo bloka i kanata
Numerical solution of contact problems of stress-strain state bodies at work steel block rope and rope
Autorzy:
Marchenko, D.
Powiązania:
https://bibliotekanauki.pl/articles/77273.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
contact problem
stress
finite element modelling
stress-strain state
steel
numerical solution
software
Opis:
The paper presented the results of studies of the stress-strain state at work steel cable block and channel Univ. Using finite element modeling performed numerical solution spatial and plane-hard contact problem using application software systems APM WIN Machine and Structure CAD. Analysis of static and dynamic load-nomic couples showed that ma-a maximal level of contact stress (stress field), and therefore the greatest intensity trybokontaktnoho wear at-work profile is on the cable block ku, namely the toroidal and conical surface due to a jam rope Their work is returned.
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 2
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 189

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies