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Wyszukujesz frazę "collapse mode" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Fusion splicing: the penalty of increasing the collapse length of the air holes in ESM-12B photonic crystal fibers
Autorzy:
Adnan, S. A.
Abdulwahhab, A. W.
Ismail, S.N.
Powiązania:
https://bibliotekanauki.pl/articles/174083.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
photonic crystal fiber
PCF
collapse length
mode field diameter
MFD
fusion splicing
guiding mechanisms
Opis:
For optimum fusion splicing process of a photonic crystal fiber, the collapsing of the air holes at any photonic crystal fiber is the key point of either increasing or decreasing the total splice loss. In this paper, an experimental study has been carried out to investigate the relation between total splice loss or total fiber attenuation due to splice loss and the length of the collapsed region of the air holes. This is done by splicing ESM-12B photonic crystal fiber between two equal lengths of single mode fibers and measuring the attenuation at different arc times and arc powers. The results showed that the increase in the length of the collapsed air holes region results in higher loss, therefore, higher fiber attenuation.
Źródło:
Optica Applicata; 2016, 46, 2; 265-275
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Collapse modes of concrete reinforced square bridge piers under vehicle collision
Autorzy:
Zhou, Xiuneng
Xie, Zhongyou
Zhao, Zhixian
Li, Cheng
Powiązania:
https://bibliotekanauki.pl/articles/2086980.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
RC square pier
collapse mode
vehicle collision
numerical simulation
Opis:
In the field of engineering protection, there is a structural disaster named heavy vehicles impacting column structures. When a heavy truck collides with a reinforced concrete (RC) column at a high velocity, a large impact force generated makes perhaps the column fail and even collapse. Therefore, it is necessary to study the dynamic characteristics during such a disaster, which can provide some reference for structural design, optimization and protection. The RC column impacted by a vehicle could be simplified as a beam fixed at the bottom loaded by a concentrated force, whose deformation is controlled by shearing and bending. In the present work, the ultimate static forces corresponding to shearing and bending collapse are proposed based on theoretical analyses. The model validation is performed using the finite element approach and the theoretical analytical results are in good agreement with the finite element simulation results, which validates the present analytical model. Three cases are simulated by utilizing finite element code ABAQUS, which reveals that the approximate plateau collapse force keeps a long stage beyond the peak failure one. In addition, three collapse modes are observed based on the static force and deformation analysis, validating the present framework which can be used for routine pier design. The work can be extended to estimate collapse modes of building columns under a vehicle collision.
Źródło:
Journal of Theoretical and Applied Mechanics; 2022, 60, 3; 375--384
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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