Autor: Wu, J.W. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Experimental study on amplitude-frequency characteristic and basin stability of horizontally driven pendulum
Autorzy:: Jia, J.
Wu, Y.
Liu, W.
Xiao, J.
Powiązania:: https://bibliotekanauki.pl/articles/281610.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: horizontally driven pendulum system
bifurcation
basin stability
Opis:: In this article, an inverted pendulum system is set up to explore the dynamics of a horizontally driven pendulum which exhibits a great variety of dynamical behavior and appears in a wide range of applications in the field of engineering. The facility is efficient to experimentally explore two kinds of coexisting movement patterns in the horizontally driven pendulum, i.e. in-phase and anti-phase patterns between the angular velocity of the pendulum rod and the direction of the driving forces. Theoretical analysis is applied to reveal the regimes of the coexistence of the two movement patterns, which is promising to control the system to a desired pattern.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 3; 839-846
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The effects of cavity geometry on an aspirated compressor cascade
Autorzy:: Guo, S.
Lu, H.-W.
Liu, J.
Wu, C.-J.
Powiązania:: https://bibliotekanauki.pl/articles/280871.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: highly loaded compressor cascade
boundary layer suction
suction flow distribution
off-take cavity
Opis:: The impact of the bleed off-take cavity within aspirated blades on the aerodynamic perfor- mance of a highly loaded compressor cascade was explored. Three-dimensional Navier-Stokes simulations were conducted in rectangular compressor cascades after validation against expe- rimental results were done. Five different off-take configurations with varying suction loca- tion were numerically evaluated. The results show that the regularities of the suction flow distribution on the suction slot inlet greatly influence the benefits of boundary layer suction. The distribution style greatly depends not only on the flow condition of the blade passage, but also on the realization of the suction process and the geometry of the cavity inside the aspirated blade. The low kinetic fluid in the endwall region compared with that around the midspan is usually prone to be sucked into the suction slot. The distribution of the suc- tion mass flow along the spanwise direction would be symmetrical if the suction position is properly selected and the inside off-take cavity is well designed, even though the bleeding system has been simplified to be asymmetrical as employed in the present document.
Źródło:: Journal of Theoretical and Applied Mechanics; 2014, 52, 1; 117-128
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Experimental investigation and modelling of hot forming B₄C/AA6061 low volume fraction reinforcement composites
Autorzy:: Zheng, K.
Lin, J.
Wu, G.
Hall, R. W.
Dean, T. A.
Powiązania:: https://bibliotekanauki.pl/articles/280433.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: Metal Matrix Composite (MMC)
hot compression
AA6061
B₄C
dislocation
Opis:: This paper presents an experimental investigation of the hot deformation behaviour of 15% B₄C particle reinforced AA6061 matrix composites and the establishment of a novel corresponding unified and physically-based visco-plastic material model. The feasibility of hot forming of a metal matrix composite (MMC) with a low volume fraction reinforcement has been assessed by performing hot compression tests at different temperatures and strain rates. Examination of the obtained stress-strain relationships revealed the correlation between temperature and strain hardening extent. Forming at elevated temperatures enables obvious strain rate hardening and reasonably high ductility of the MMC. The developed unified material model includes evolution of dislocations resulting from plastic deformation, recovery and punching effect due to differential thermal expansion between matrix and reinforcement particles during non-steady state heating and plastic straining. Good agreement has been obtained between experimental and computed results. The proposed material model contributes greatly to a more thorough understanding of flow stress behaviour and microstructural evolution during the hot forming of MMCs.
Źródło:: Journal of Theoretical and Applied Mechanics; 2018, 56, 2; 457-469
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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