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41.
Houari Boumedine Khenous Patrick Laborde Yves Renard 《European Journal of Mechanics - A/Solids》2008,27(5):918-932
This paper is devoted to a new method dealing with the semi-discretized finite element unilateral contact problem in elastodynamics. This problem is ill-posed mainly because the nodes on the contact surface have their own inertia. We introduce a method based on an equivalent redistribution of the mass matrix such that there is no inertia on the contact boundary. This leads to a mathematically well-posed and energy conserving problem. Finally, some numerical tests are presented. 相似文献
42.
Marius Ghergu Georges Griso Houari Mechkour Bernadette Miara 《Comptes Rendus Mecanique》2005,333(3):249-255
In this Note we establish the limit constitutive law of a piezoelectric material with periodically perforated microstructures and whose reference configuration is a thin shell with fixed thickness. The justification of the new associated model (we show that the limit global and local problems are more complicated than the intial one) is obtained using the periodic unfolding method introduced by Cioranescu, Damlamian and Griso. To cite this article: M. Ghergu et al., C. R. Mecanique 333 (2005). 相似文献
43.
A. Benamar D. Rayane P. Melinon B. Tribollet M. Broyer 《Zeitschrift für Physik D Atoms, Molecules and Clusters》1991,19(4):237-239
Selenium and tellurium clusters are produced by the inert gas condensation technique. The mass spectra of both species are completely different and reveal different properties. In selenium, a periodicity of 6–7 is observed and may be interpreted by the binding energy between small cyclic molecules. Moreover, it was very difficult to obtained large clusters probably because the binding energy between these molecules is very small. In tellurium, these periodic structures do not exist and large clusters are easily obtained in nucleation conditions where only small selenium clusters are present. These results are discussed and a simple nucleation model is used to illustrate this different behavior. Finally these clusters properties are correlated to the bulk structure of both materials. 相似文献
44.
Menni Younes Ameur Houari Inc Mustafa 《Journal of Thermal Analysis and Calorimetry》2022,147(1):545-566
Journal of Thermal Analysis and Calorimetry - An attempt is made to enhance the thermal hydrodynamic performance of a solar channel by using vortex generators including attached fins and detached... 相似文献
45.
Transport in Porous Media - In order to assess the capability of a filter skeleton to retain flowing particles transported from eroded soil, different models based on continuous or discrete medium... 相似文献