Results 201 to 210 of about 27,669 (247)

Third Body Perturbations of Double Stars

Celestial Mechanics and Dynamical Astronomy, 1997
We report on the different results concerning the stability of the hierarchical triple systems where a close binary is accompanied by a third star. There are different possible approaches to answer the question of the stability limits for such triple stars: the most direct investigations can be undertaken in integrating numerically the respective ...
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A mathematical model for the third-body concept

Mathematics and Mechanics of Solids, 2017
The third-body concept is a pragmatic tool used to understand the friction and wear of sliding materials. The wear particles play a crucial role in this approach and constitute the main part of the third-body. This paper aims to introduce a mathematical model for the motion of a third-body interface separating two surfaces in contact.
Krejčí, Pavel, Petrov, Adrien
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Elusive 'Third Bodies'

1996
The Third Body Concept is a very useful tool for simplifying and unifying the identification of tribo-logical system. In its initial formulation by Godet, it was implied that the system could be defined like a hydro-dynamic system, with the number and behavior of the constituents being initially specified.
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The third body in the eclipsing system RR Lyn

Astronomy Reports, 2002
Based on 70 years of published photoelectric observations, we have detected quasi-periodic cophased oscillations of the times of the primary and secondary minima of RR Lyn, one of the brightest and nearest eclipsing binaries in the northern sky (\(V = 5\mathop m\limits_. 54\); r=74 pc).
Kh. F. Khaliullin, A. I. Khaliullina
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Widening Classical Wear Laws to the Concept of Third Body

World Tribology Congress III, Volume 1, 2005
During the second part of the twentieth century, many efforts have been done to model wear. Particularly, Archard proposes in 1953 [1] one of the first wear law, which is often written on the following form: dW/dt=K.P.V(1) with dW/dt the mass of detached particles from the rubbing materials per unit time, P the applied pressure, V the sliding speed and
Fillot, Nicolas, Iordanoff, Ivan, Berthier, Yves   +2 more
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Expansion of the Third-Body Disturbing Function

Journal of Guidance, Control, and Dynamics, 1981
HE expansion of the disturbing function still remains one of the most important problems in celestial mechanics, both in planetary applications and artificial satellite problems. The expansion of the gravitational disturbing function in zonal and tesseral harmonics based on the Legendre polynomials is now relatively easy to perform with the help of ...
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Numerical simulation of the third body in fretting problems

Wear, 2011
This study is devoted to the computation of realistic stress and strain fields at a local scale in fretting. Models are proposed to improve surface and volume modelling, by taking into account the heterogeneity of stress fields due to the irregular interface. This gives a new view toward damage mechanisms.
Basseville, Stéphanie, Héripré, Eva, Cailletaud, Georges   +2 more
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Expansion of the third-body disturbing function

18th Aerospace Sciences Meeting, 1980
HE expansion of the disturbing function still remains one of the most important problems in celestial mechanics, both in planetary applications and artificial satellite problems. The expansion of the gravitational disturbing function in zonal and tesseral harmonics based on the Legendre polynomials is now relatively easy to perform with the help of ...
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Effectiveness of the third body in the direct recombination of ions

Russian Journal of Physical Chemistry B, 2014
The dynamics of the three-body recombination of the Cs+ and Br− ions with the formation of products with the lowest internal energy in the presence of the neutral atoms R = Hg, Xe, and Kr as third bodies is studied. The efficiency of the process is characterized by the effectivity function, which represents the dependence of the internal energy of the ...
E. V. Ermolova, L. Yu. Rusin
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Third body effects in fretting

1996
Experiments have been carried out, using a tension-compression hydraulic machine, to investigate the fretting behavior of TiN coatings on high speed steel (HSS) against an alumina ball. In the experiments reported here, a range of different normal loads, displacement amplitudes and frequencies was used and the relative humidity of the test atmosphere ...
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