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Wyszukujesz frazę "continuous deformations" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Influence of mining operations on road pavement and sewer system selected case studies
Autorzy:
Grygierek, M.
Kalisz, P.
Powiązania:
https://bibliotekanauki.pl/articles/92092.pdf
Data publikacji:
2018
Wydawca:
Główny Instytut Górnictwa
Tematy:
nawierzchnia drogowa
system kanalizacyjny
ciągłe deformacje górnicze
nieciągłe deformacje górnicze
road pavement
sewer system
continuous mining deformations
discontinuous mining deformations
Opis:
Underground mining operations cause surface deformations which influence structures. A particular group of structures which are susceptible to the influence of mining operations are so-called “linear objects”, whose characteristic parameter is their length. Linear objects consist of, for example: roads, rails, sewers and water supply systems. Changes in the length of measurement bases (deformations) accompanying mining deformations and changes in ordinates, including the difference in subsidence (inclination), to a large extent determine the utility properties of the structures and create a significant nuisance when using them and even causing them to fail completely. It is worth emphasising that when applying proper preventive measures once continuous deformations have begun, it is possible to use the objects for a relatively long period of time. In the case of discontinuous deformations, the utility properties are significantly deteriorated, which most often leads to failures, significantly hastening the decision to conduct repair works. This article presents selected cases of the continuous influence of mining operations on a sewer system and of discontinuous deformations on a road pavement. The presented research and in situ observations may be useful in assessing, designing or re-building such structures in areas where mining operations are planned.
Źródło:
Journal of Sustainable Mining; 2018, 17, 2; 56-67
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of Hot Continuous Rolling of a Plain Carbon Steel Using the MAXStrain II® Multi-Axis Deformation System
Autorzy:
Schindler, Ivo
Kawulok, Petr
Konečná, Kateřina
Sauer, Michal
Navrátil, Horymír
Opěla, Petr
Kawulok, Rostislav
Rusz, Stanislav
Powiązania:
https://bibliotekanauki.pl/articles/28099659.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
MaXStrain II system
multi-axis deformations
hot continuous rolling
physical simulation
Opis:
A simple methodology was used for calculating the equivalent strain values during forming the sample alternately in two mutually perpendicular directions. This method reflects an unexpected material flow out of the nominal deformation zone when forming on the MAXStrain II device. Thus it was possible to perform two temperature variants of the simulation of continuous rolling and cooling of a long product made of steel containing 0.17% C and 0.80% Mn. Increasing the finishing temperature from 900°C to 950°C and decreasing the cooling rate from 10°C/s to 5°C/s led to a decrease in the content of acicular ferrite and bainite and an increase in the mean grain size of proeutectoid ferrite from about 8 µm to 14 µm. The result was a change in the hardness of the material by 15%.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 2; 741--747
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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