Temat: irregularity - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of the irregularity coefficient of loading on calculated fatigue life
Autorzy:: Pawliczek, R.
Kluger, K.
Powiązania:: https://bibliotekanauki.pl/articles/281651.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: fatigue
irregularity coefficient
mean stress
Opis:: The paper presents comparison of two methods for determination of the fatigue damage degree in a material subjected to random loadings with participation of the mean loading and including the irregularity coefficient of the loading. The authors estimated effectiveness of the method where the stress history was transformed considering the global mean value of the load history and the method for which the stress mean value of the distinguished loading cycles was taken into account. When the irregularity coefficient of loading increases, we can observe significant divergences of the calculated fatigue life of the material related to the model of amplitude transformation because of the loading mean value.
Źródło:: Journal of Theoretical and Applied Mechanics; 2013, 51, 4; 791-798
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Propagation of the torsional wave in an irregular self-reinforced composite material bounded between two half-spaces
Autorzy:: Gupta, Shishir
Das, Sandip Kumar
Powiązania:: https://bibliotekanauki.pl/articles/1839613.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: torsional waves
phase velocity
sandy layer
irregularity
initial stress
Opis:: This research article is concerned with the analytical assessment and mathematical modelling to unveil the characteristic of a torsional wave in the irregular Earth’s crustal stratum. This investigation has been performed to clarify of possible occurrence of the torsional wave in an irregular self-reinforced composite layer bonded between dry sandy media and an isotropic elastic half-space. Rectangular and parabolic irregularities have been assumed at the interface of the intermediate layer and the lower half-space. In order to acquire the required dispersion equation, the appropriate boundary conditions with the assistance of displacement and stress components have been well satisfied. The effects of different affecting parameters such as reinforcement, sandiness, initial stress and irregularity parameters have been explored and explained by suitable graphs. Moreover, a comparative study has also been accomplished graphically for rectangular, parabolic, and no irregularities.
Źródło:: Journal of Theoretical and Applied Mechanics; 2020, 58, 4; 971-982
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Research on chaotic features of a flow field over a plunging airfoil based on dynamic mode decomposition
Autorzy:: Qi, Yuhang
Yang, Wenqing
Wang, Yue
Song, Bifeng
Powiązania:: https://bibliotekanauki.pl/articles/1839716.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: plunging airfoil
chaotic flow
dynamic mode decomposition
thrust characteristic
irregularity
Opis:: Periodic motion of a plunging airfoil causes continuous changes in the surrounding flow field. The time-dependent thrust coefficient depends entirely on unsteady characteristics of the flow field. On the contrary, the time-dependent thrust coefficient may also reflect the unsteady characteristics of the corresponding flow field. With the fast Fourier transform (FFT) and dynamic mode decomposition (DMD), unsteady aerodynamic forces can be correlated with the flow field characteristics in the frequency domain. In the present paper, DMD is performed to analyze the unsteady characteristics of the flow field around a plunging NACA0012 airfoil at the Reynolds number of 20 000.
Źródło:: Journal of Theoretical and Applied Mechanics; 2021, 59, 2; 293-305
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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