Publications

2011
BENYAHIA H, OUTTAS T, ZAATRI A. Coneption et Réalisation d’un Robot mobile avec chassis en stratifiés composite BC Rover 11. Journées d’Etudes Nationales de Mécanique. 2011.
SAFARI-MOHSENABAD S, SELVAGANAPATHY PR, Derardja A, DEEN MJ. Electrochemical Growth of High-aspect Ratio Nanostructured Silver Chloride on Silver and its Application to Miniaturized Reference Electrodes. Nanotechnology [Internet]. 2011;Vol. 22(31) :315601, 8 journal pages. Publisher's VersionAbstract

The sensitivity of many biological and chemical sensors is critically dependent on the stability of the potential of the reference electrode being used. The stability of a reference electrode's potential is highly influenced by the properties of its surface. In this paper, for the first time, the formation of nanosheets of silver chloride on silver wire is observed and controlled using high anodic constant potential (>0.5 V) and pulsed electrodeposition. The resulting nanostructured morphology substantially improves the electrode's potential stability in comparison with the conventional globular surface structure. The increased stability is attributed to the increase in the surface area of the silver chloride produced by the nanosheet formation.

Derardja A, BAROURA L, BRIOUA M. Isotropic Stress Distribution in Cu/(001) Fe Two Sheets, World Academy of Science. Engineering and Technology [Internet]. 2011;Vol:5 :pp 07-23. Publisher's VersionAbstract
The nanotechnology based on epitaxial systems includes single or arranged misfit di slocations. In general, whatever is the type of dislocation or the geometry of the array formed by the dislocations; it is important for experimental studies to know exactly the stress distribution for which there is no analytical expression [1,2]. This work, using a numerical analysis, deals with relaxation of epitaxial layers having at their interface a periodic network of edge misfit dislocations. The stress distribution is estimated by using isotropic elasticity. The results show that the thickness of the two sheets is a crucial parameter in the stress distributions and then in the profile of the two sheets.
A comparative study between the case of single dislocation and the case of parallel network shows that the layers relaxed better when the interface is covered by a parallel arrangement of misfit.
Consequently, a single dislocation at the interface produces an important stress field which can be reduced by inserting a parallel network of dislocations with suitable periodicity.
2010
Djebarra Y. Etude du durcissement structural des alliages d’aluminium destinés à la fabrication de culasse de moteur à combustion MADANI S, BENYAHIA M. Génie Mecanique,Univ batna,algérie. 2010.
MADANI S, OUTTAS T. Simulation du Comportement de la Fatigue des Matériaux Utilisés en Biomécanique . Application à un Implant Dentaire. GENIE MECANIQUE. 2010.
MESMOUDI K. Etude Expérimentale et Numérique de la Distribution de la Température et de l’Humidité de l’Air dans un Abri Serre, dans Les Haut Plateaux d’Algérie, Région des Aurès. SOUDANI A. GENIE MECANIQUE [Internet]. 2010. Thèse en ligne
BENHIZIA A, OUTTAS T. Simulation of crash resistance, an investigation into vehicle frame stiffness in frontal impact test using ls dyna, , 13-15 December. International Conference on Applied Mechanics, Materials and Manufacturing. 2010.
GHOGGALI S, OUTTAS T, MADANI S. Modeling and simulation of dental implant: a static, dynamic and fatigue study using finite element analysis, , 13-15 December. international conference on applied mechanics, materials and manufacturing. 2010.
SAFARI-MOHSENABAD S, SELVAGANAPATHY PR, Derardja A, DEEN MJ. Nanosheet Formation by Electrodeposition and Its Application to Miniaturized Reference Electrodes ,25 - 30 avril. 217th ECS Meeting [Internet]. 2010. Publisher's Version
MESMOUDI K, SOUDANI A, BOURNET PE, BOUGOUL S. The Convection Heat Transfert Coefficient at the Greenhouse Cover under Semi Arid Climatic Conditions” from 22 to 25 April. The second international conference on conversion energy and conservation. 2010.
MESMOUDI K, SOUDANI A, BOURNET PE, BOUGOUL S. Heat Transfer Conductance at the Greenhouse Cover, WERA’, , 28-29 Septembre,. Work Shop International sur les Energies renouvelables et leurs Application. 2010.
MESMOUDI K, SOUDANI A, BOURNET PE. The determination of the inside air temperature of a greenhouse with tomato crop, under hot and arid climates. [Internet]. 2010;Vol. 5 (N°2) :pp 114-127. . Publisher's VersionAbstract

    Up to now, few studies were devoted to the description of the energy balance components of a greenhouse located in the semi arid region of the southern Mediterranean basin, and no attention was paid to the prediction of the inside air temperature. In this study, experiments were undertaken to investigate the response of a greenhouse to the outside climate conditions considering a naturally ventilated Venlo glasshouse with a tomato crop. The measurements show that the difference between inside and outside air temperature is strongly linked to the incoming solar radiation as well as to the wind speed. From these results a simplified model was established to predict the greenhouse air temperature, knowing the greenhouse characteristics and the outside climate variables. The model is based on the energy balance of the greenhouse. Using a parameter identification technique, the model was calibrated against the experimental results. A sensivity analysis was conducted to assess the impact of several physical parameters such as solar radiation, wind speed and cover transmission on the evolution of the inside air temperature. This model appears to be suitable for predicting the greenhouse air temperature satisfactorily, at least during night

MESMOUDI K, SOUDANI A, ZITOUNI B, BOURNET PE, SERIR L. Experimental study of the energy balance of unheated greenhouse under hot and rid climates: Study for the night period of winter season,. Journal of the Association of Arab Universities for Basic and Applied Sciences [Internet]. 2010;vol. 9 :pp: 27-37. Publisher's VersionAbstract

    In regions with warm and hot climates as is the case of several countries of the Mediterranean basin, it is interesting to study the energy balance inside a greenhouse and to quantify the heat transfers along the building components (roof, walls and ground) in winter and during night time. The present experimental work was conducted in an unheated glasshouse without crop in the region of Batna, Algeria. Three types of measurements were done from January to March: the first one is at a cloudy night; the second one at a windy night and the third one at a cloudless night. The results indicate that the greenhouse ground is considered as a significant heat source which can compensate the energy losses through the walls especially during a night preceded by a significant diurnal insulation. In addition, the convection heat transfer coefficients inside and outside the greenhouse were estimated and analysed. A good agreement with the models reported in the literature was found.

Derardja A. Anisotropic Elastic Distortions of a Buried Dissociated Hexagonal Network of Dislocations in a Nickel Based Super Alloys,. Advanced Materials Research, Advances in Materials and Processing Technologies [Internet]. 2010;Volumes 83 - 86 :pp 289-295. Publisher's VersionAbstract

    Nickel based super alloys are promising materials for high temperature structural applications because of their low density. The single grain super alloys are extremely creep resistant at high temperature, due to the fraction of Ni3Al based ' precipitates coherent with a Ni based  matrix [1, 3]. The cuboids group together and form semi-coherent interfaces after a long annealing at high temperature. The ' precipitate growths in nickel base super alloys often favor the parallelism of (111) planes between cubic dissimilar crystals [4]. In consequences, a hexagonal network of dislocations, that covers the hetero-interphase, is arranged by accommodation of the angular misfit between two semi coherent crystals ( ). In this work, the magnitude of the distortions is simulated as arising from a trigonal network of subsurface misfit dislocations partly dissociated in Shockley dislocations limiting intrinsic and /or extrinsic stacking faults. The results derived from a previous explicit formulation using double Fourier series [5]. Each harmonic term of the series depends on the anisotropic elastic constants and the thickness of each phase. The program built is in a double precision Fortran language and it shows the magnitude and the aspect of the distortions of the free surfaces when the dissociation change in the hetero-interphase. Also, the program has the advantage to fully apply to hetero-epitaxial systems, whatever is the thickness of the free surfaces.

 

2009
Derardja A. Simulation of Thin Film Relaxation by Buried Misfit Networks,. International Journal of Mechanical, Industrial and Aerospace Engineering, [Internet]. 2009;VOL 3 (2) :pp 98-103 . Publisher's Version

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