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Wyszukujesz frazę "rolling shear" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Analysis of the Effect of Rolling Speed on the Capability to Produce Bimodal-Structure AZ31 Alloy Bars in the Three-High Skew Rolling Mill
Autorzy:
Stefanik, A.
Szota, P.
Mróz, S.
Powiązania:
https://bibliotekanauki.pl/articles/352307.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
three-high skew rolling mill
radial-shear rolling
magnesium alloys
bimodal-structure bars
FEM
Opis:
A numerical analysis of the process of single-pass rolling of AZ31 magnesium alloy bars in the three-high skew rolling mill has been carried out in the study. Based on the obtained investigation results, the effect of rolling speed on the band twist and the state of stress and strain occurring in the rolled band has been determined. From the obtained results of the numerical studies it has been found that with the increase in rolling speed the unit band twist angle θ, increase, which translates into an increase in the value of tangential stress in the axial zone of the rolled bar. This contributes directly to an increase in redundant strain in the rolled bar axial zone, which brings about a structure refinement. To verify the effect of rolling speed on the flow pattern and the stress and strain state, experimental tests were carried out. It has been found from the tests that the band twist (flow pattern) contributes to obtaining a bimodal structure in the bar cross-section.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 1; 329-335
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanics of stripped CLT panels with numerical validity testing
Autorzy:
Hasana, Md. Zahid
Saha, Sabhasachi
Souvik, Roy
Rahmand, Md. Sazid
Powiązania:
https://bibliotekanauki.pl/articles/1177937.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
CLT
Cross-laminated solid timber
EN 789
NDE
bending strength / stiffness
failure mode
modal analysis
production control
rolling shear
variation of mechanical properties
Opis:
Cross-laminated timber (CLT) is a board molded designed wood item, amassed of cross-wise situated layers of lamellas. Subsequently, anticipating the particular conduct of such boards requires exact data about their twisting and shear quality and additionally their flexible properties. Directions with respect to the inference of execution qualities, assessment of similarity and stamping of wood-based boards for use in development are given in EN 13986. As per this standard bowing quality and stiffness of CLT must be evaluated following the system in EN 789. The last requires 4-point twisting trial of strip-formed examples with a width of 300 mm, remove the CLT boards. The traverse must be taken as 300 mm + 32 t, t being the ostensible thickness of the CLT board. By looking at aftereffects of bowing tests on strip-formed examples and on full boards it is appeared, that neither quality nor stiffness properties determined by testing strip-molded boards are suitable to survey the separate properties of the first boards. Moreover a check via doing static twisting tests (diversion estimations) under various stacking circumstances appeared, that the general stiffness properties (versatile parameters of the stiffness network) can, on the other hand to EN 789 tests or estimations with the compound hypothesis, be determined straightforwardly by a modular investigation of full-measure CLT boards.
Źródło:
World Scientific News; 2018, 97; 185-206
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Technology for Ultrafine-Grained Materials for Usage as Materials in Nuclear Power
Autorzy:
Naizabekov, Abdrakhman
Arbuz, Alexandr
Lezhnev, Sergey
Panin, Evgeniy
Knapiński, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/27315817.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
radial-shear rolling
austenitic stainless steel
severe plastic deformation
ultrafine-grained materials
walcowanie
stal nierdzewna
odkształcenie plastyczne
materiały ultradrobnoziarniste
Opis:
Nuclear power is associated with great environmental risks. In many cases, the problem of accidents of nuclear power plants is related to the use of materials that do not fully meet the following requirements: high corrosion resistance; high temperature resistance; creep resistance; fracture toughness; stability of structure and properties under irradiation. Therefore, studies aimed at finding materials that can withstand long-term loads at high temperatures, aggressive environment and gradual structural degradation under the influence of radiation are relevant. One of the structural materials, which has high resistance to radiation, is austenitic stainless steel. And one of the ways to increase the radiation resistance of parts made of this steel grade is to grind its microstructure to ultra-fine-grained state. Such structures provide a combination of a high level of strength characteristics with high plasticity, which distinguishes such materials from their coarse-grained counterparts. Also, numerous grain boundaries serve as runoff surfaces for radiation defects, preserving the structure, which causes their increased radiation resistance. From all methods for producing sub-ultra-fine grained materials the most promising is the severe plastic deformation (SPD), which can be implemented in the metal in various ways, including radial-shear rolling. This paper presents the results of studies of the process of radial-shear rolling on the mill SVP-08 and its effect on the microstructure and properties of austenitic stainless steel. During the study, bars with a diameter of 13 mm from AISI-321 steel with a grain size of 300-600 nm were obtained, while the mechanical properties increased more than 2 times compared to the initial values.
Źródło:
New Trends in Production Engineering; 2019, 2, 2; 114-125
2545-2843
Pojawia się w:
New Trends in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Results of research by the numerical methods impact on the way special and specialized rolling stock in the curves of small radii
Resul'tyta issledovanijj chislennymi metodami vzaimodejjstvijj na put' special'nogo i specializirovannogo podvizhnogo sosstava v krivykh malykh radiusov
Autorzy:
Derenskiy, A.
Powiązania:
https://bibliotekanauki.pl/articles/791968.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
rolling stock
rail track
shear force
industrial vehicle
dynamic system
numerical method
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2013, 13, 3
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jakość gwintów wewnętrznych walcowanych i nagniatanych głowicami rolkowymi
The quality of internal threads rolled and burnished with roller heads
Autorzy:
Okoński, S.
Moszumański, R.
Tabor, A.
Powiązania:
https://bibliotekanauki.pl/articles/257938.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
gwint
walcowanie
nagniatanie
głowica rolkowa
średnica podziałowa
chropowatość powierzchni
wytrzymałość na ścinanie
struktura materiału
twardość
thread
rolling
burnishing
roller head
pitch diameter
surface roughness
shear strength
structure of material
hardness
Opis:
Gwinty kształtowane plastycznie mają szereg zalet. Możliwe jest uzyskanie niskiej chropowatości powierzchni i dużej dokładności. Gwint ma podwyższoną wytrzymałość na ścinanie i docisk powierzchniowy. Przeprowadzono badania wymiarów i chropowatości powierzchni gwintów walcowanych i nagniatanych oraz badania porównawcze wytrzymałości na ścinanie gwintów walcowanych i skrawanych. Ponadto przeprowadzono badania mikrostruktur oraz wyznaczono rozkłady twardości HV0,1 na przekrojach gwintów walcowanych.
The threads fabricated by plastic working offer a number of indisputable advantages. It is possible to obtain low surface roughness and high accuracy. The threads are characterised by high shear strength and surface pressure. The dimensions and surface roughness of the threads were checked and the shear strength of the rolled and machined threads was compared. Additionally, microstructural examinations were made on cross-sections of the rolled threads and hardness distribution was determined.
Źródło:
Problemy Eksploatacji; 2010, 4; 163-175
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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