Temat: strain state - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Локальная устой чйвость плоскйх многограннйков сетчатых куполов
Local stability of flat polyhedrons of mesh domes
Autorzy:: ДРАГАН, В. И.
ГЛУШКО, К. К
Tematy:: stress-strain state
fragment
mesh dome; Pokaż więcej
Wydawca:: Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
Powiązania:: https://bibliotekanauki.pl/articles/1203945.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

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.
Tematy:: numerical analysis
stress-strain state
rope; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/102692.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Partial cases of stressed-deformed condition of casing and pump compressor pipes
Autorzy:: Vasylyshyn, Vitalii
Taras, Iryna
Bekish, Iryna
Kornuta, Olena
Kornuta, Volodymyr
Tematy:: tubing
stress-strain state
fatigue life
tightening torque; Pokaż więcej
Wydawca:: STE GROUP
Powiązania:: https://bibliotekanauki.pl/articles/409894.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

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.
Tematy:: concrete beam
stress-strain state
finite element modeling
ANSYS; Pokaż więcej
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Powiązania:: https://bibliotekanauki.pl/articles/950449.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Effect of increasing mining rate on longwall coal mining – Western Donbass case study
Autorzy:: Sdvyzhkova, O.
Patyńska, R.
Tematy:: rock
stress-strain state
mining rate
failure criterion
roof collapse; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/178393.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Ocenka deformirujemosti zagotovok v processe valcovki
Estimation of deformability billets during rolling
Autorzy:: Gun'ko, I.
Dobranuk, Y.
Tematy:: stress-strain state
cylindrical billet
stress state parameter
deformability
rolling
trajectory deformation; Pokaż więcej
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Powiązania:: https://bibliotekanauki.pl/articles/78062.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Friction heating and stress-strain state of ventilated disc brakes
Autorzy:: Holenko, Kostyantyn
Dykha, Oleksandr
Babak, Oleg
Posonskiy, Sergiy
Tematy:: brake discs
thermal load
stress-strain state
safety
stress
heat flow; Pokaż więcej
Wydawca:: Fundacja Centrum Badań Socjologicznych
Powiązania:: https://bibliotekanauki.pl/articles/2204250.pdf Link otwiera się w nowym oknie
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).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Wpływ temperatury na stan naprężenia i odkształcenia w otoczeniu komory siłowni elektrowni "Porąbka-Żar"
The relationship between temperature and stress and strain state in the vicinity of the chamber "Porąbka-Żar" power station
Autorzy:: Domańska, D.
Gruszka, R.
Tematy:: wyrobisko wielkogabarytowe
temperatura
stan naprężenia
large chamber
temperature
stress state
strain state; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:: https://bibliotekanauki.pl/articles/350000.pdf Link otwiera się w nowym oknie
Opis:: W artykule podjęto próbę wstępnej oceny wpływu temperatury na stan naprężenia i odkształcenia w otoczeniu wyrobiska podziemnego na podstawie analizy zjawisk zachodzących w sąsiedztwie komory siłowni elektrowni "Porąbka-Żar". Wymienione zagadnienie ma szczególne znaczenie w odniesieniu do budowli wielkogabarytowej, z jaką mamy do czynienia w rozpatrywanym przypadku, dla której nawet niewielka zmiana temperatury może powodować duże wahania parametrów ważnych z punktu widzenia jej stateczności. Podstawą przeprowadzonej analizy były wyniki pomiarów realizowanych przez OBR BG "Budkop" w wymienionym wyrobisku. Przebiegi wybranych funkcji ciśnienia panującego w górotworze i jego rozwarstwień uzyskane z badań in situ powiązano zależnościami korelacyjnymi z temperaturą panującą w komorze. Zgodnie z przewidywaniami wynikającymi z teorii termosprężystości (w pracy zostały zawarte wyniki obliczeń przybliżonych), zaobserwowano istotny wpływ oddziaływania cieplnego na charakter zmian i wartości poszczególnych parametrów mierzonych.
In the paper preliminary estimation of the stress and strain state around the underground excavation under an influence of temperature is presented. Discussing problem is very important especially for the large chamber (e.g. chamber of the "Porąbka-Żar" power station is described) for which even small fluctuation of temperature can induce big changes of stresses, significant from a static point of view. The analysis presented in the paper is based on measurements that has been executed by Budokop in the excavation. The stress and delamination functions are got from measurements and temperature is taken in the chamber, are interconnected by correlation function. In accordance with expectations coming from the thermoelasticity theory (the paper includes results of approximate calculations), existence of the significant relationship between temperature field and parameters form measurements (i.e. stress and strain in the vicinity of the chamber) is found.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: The Influence of Technological Conditions of the Process of Cogging in Flat Dies on the Quality of Two-Phase Titanium Alloys
Autorzy:: Dyja, H.
Tukibay, A. A.
Mashekov, S. A.
Tematy:: cogging
flat die
stress-strain state
effective stresses and strains
tilting
reduction; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/354341.pdf Link otwiera się w nowym oknie
Opis:: To create a rational technology of cogging process and to determinate the optimal values of the angles of tilt and single reduction the stress-strain state (SSS) of the blank during cogging in the flat dies was analyzed. By using the finite element method and program MSC.SuperForge quantitative data are obtained and the basic patterns of distribution of SSS, the temperature during the simulation of tilting in flat dies with different angles of tilting and the amount of reduction were established. Sustainable experimental-industrial technology of forging of two-phase titanium alloys was developed and tested.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Designing and strength analysis of a screw-type press for sunflower oil production
Autorzy:: Korendiy, Vitaliy
Kachur, Oleksandr
Havran, Volodymyr
Tematy:: oil extraction
stress-strain state
simulation
SolidWorks software
deformation; Pokaż więcej
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Powiązania:: https://bibliotekanauki.pl/chapters/60016633.pdf Link otwiera się w nowym oknie
Opis:: Sunflower oil is extremely important and widely used in the food industry, pharmaceutics, cosmetology, and numerous technical fields. The main purpose of this research is to propose a novel design of a crew-type press for sunflower oil extraction and to analyze the stress-strain conditions of its certain components, particularly, connecting shaft and screw. Simulation results obtained in SolidWorks software show the distribution of equivalent stresses and deformations in the corresponding element.
Dostawca treści:: Biblioteka Nauki

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