Temat: parametry siły - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: FEM modelling of a helical wedge rolling process for axisymmetric parts
Autorzy:: Pater, Zbigniew
Tomczak, Janusz
Powiązania:: https://bibliotekanauki.pl/articles/102535.pdf
Data publikacji:: 2018
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: helical wedge rolling
tools
force parameters
FEM
spiralne zwijanie klinów
narzędzia
parametry siły
MES
Opis:: The paper reports the results of a numerical analysis of helical-wedge rolling (HWR), a new metal forming method developed at the Lublin University of Technology. The numerical analysis was performed for three axisymmetric parts: a rotary cutter body, a stepped shaft and a ball pin. The numerical modeling was performed using the commercial simulation software Forge NxT 1.0. The paper examines changes in workpiece shape as well as variations in effective strains, temperatures, damage function, force parameters (on the rolls and guides), and torques acting on the rolls. It has been found that due to its advantages (low material losses and high efficiency), the new helical-wedge rolling process can be used as an alternative to currently employed methods for producing axisymmetric products.
Źródło:: Advances in Science and Technology. Research Journal; 2018, 12, 1; 115-126
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Identyfikacja własności dynamicznych cięgien jako element diagnostyki wybranych konstrukcji mostowych
Identification of dynamic properties of tendons as an element of diagnostics of selected bridge constructions
Autorzy:: Żółtowski, K.
Binczyk, M.
Kalitowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/383947.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:: cięgna
pomiar siły
błąd pomiaru
drgania własne
parametry modalne
Opis:: W artykule przedstawiono własne doświadczenia związanie z oceną siły napięcia cięgien w mostach. Szczególną uwagę poświęcono zewnętrznym cięgnom sprężającym w mostach żelbetowych. Przeprowadzono dyskusję dotyczącą wpływu błędów pomiarowych w ocenie sprężenia kabla określonej na podstawie identyfikacji częstości własnych.
The paper deals with the authors experiences connected with estimation of force in bridges’ tendons. Particular attention was paid to the external postensioning cables in reinforced concrete bridges. Discussion about an influence of measurement errors for assessment of a force, identified through measured eigenfrequency in a tendon is described. Problems with definition of the theoretical length, mass of tendon and boundary conditions are discussed.the structure. The described case of prestressing cable failure shows the significance of correct cable duct grouting for protection of cables against corrosion.
Źródło:: Archiwum Instytutu Inżynierii Lądowej; 2018, 26; 219-227
1897-4007
Pojawia się w:: Archiwum Instytutu Inżynierii Lądowej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The influence of changing of cutting parameters on temperature and cutting forces during turning process by CCET09T302R-MF insert
Autorzy:: Labuda, W.
Powiązania:: https://bibliotekanauki.pl/articles/241601.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: turning dynamometer
temperature
cutting forces
cutting parameters
stainless steel
dynamometr
temperatura
siły skrawania
parametry cięcia
stal nierdzewna
Opis:: One of the greatest problems of modern production techniques is the achievement of an appropriate quality at minimal costs and accompanied by the production efficiency increase. Therefore, while designing the production process, the technology used should have a considerable influence on the durability and reliability of machine parts to be produced. During finish treatment, the final dimensions as well as functional properties are imparted to a given element by application of proper treatment type. The engineer has a range of production techniques to choose for the proper surface layer formation. It is crucial to find a suitable solution which will meet the requirements as well as the work conditions of a given machine part. The article presents the results of influence of change of cutting parameters on temperature and cutting forces during turning process of stainless steel. A shaft made of 304L stainless steel was used for the research. The cutting process was carried out on a universal CDS 6250 BX-1000 centre lathes. Measurement of cutting forces during turning process used DKM 2010 turning dynamometer. A cutting tool conducted the turning process with CCET09T302R-MF insert by DIJET. During the turning, the following machining parameters were used: cutting speed Vc = 226 m/min, feed f = 0.044; 0.062; 0.083; 0.106 mm/rev and cutting depth ap = 0.375; 0.625; 0.875 mm. The chemical composition of steel was measured by Solaris-ccd plus optical spectrometer. The Smartzoom 5 microscope made the view of the nose radius of cutting tool.
Źródło:: Journal of KONES; 2018, 25, 1; 249-256
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The influence of the "train-track" system parameters on the maximum longitudinal forces level
Autorzy:: Pshinko, Oleksandr
Ursulyak, Liudmyla
Kostrytsia, Serhii
Fedorov, Yevhen
Shvets, Anzhela
Powiązania:: https://bibliotekanauki.pl/articles/375397.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: mathematical modelling
parameters of the longitudinal profile
regulating braking
longitudinal forces of impact and quasistatic character
braking distances
modelowanie matematyczne
parametry profilu podłużnego
regulacja hamowania
wzdłużne siły uderzenia
droga hamowania
Opis:: The main objective of the simulation is to study the effect caused by the parameters of the longitudinal profile on the maxima of longitudinal forces in freight trains of increased length during adjustment braking and running-out. To decrease the number of numerical experiments, some empirical formulae for estimating the maximum longitudinal forces during the motion of freight trains along the track with various configurations of its longitudinal profile's gradient changes have been obtained for the first time. Comparison of those forces with the permitted values, from the point of view of the railway stock strength and eventual vehicle derailment, has been performed. As a result of numerical integration of the system of non-linear differential equations of train motion for the considered driving modes, the values of the greatest longitudinal shock and quasi-static forces, as well as the dependence of the latter on the train length, initial braking velocity, on the algebraic difference of gradients and the length of the horizontal area that separates two gradients with opposite signs are estimated. The proposed mathematical model and methodology can be applied during standardization of the longitudinal profile's parameters from the point of view of the freight traffic safety for the trains of various length.
Źródło:: Transport Problems; 2019, 14, 4; 161-172
1896-0596
2300-861X
Pojawia się w:: Transport Problems
Dostawca treści:: Biblioteka Nauki

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