In this paper, an adaptive controller is applied to the piezoelectric actuators, PEA, in order to handle them. Our paper deals with the design of a new adaptive neuro-fast terminal sliding mode controller. The new adaptive control law using the terminal attractor concept is used in the finite time control procedure of the non-linear model. The PEA ...

By Ounissi Amor, Azeddine Kaddouri, Rachid Abdessemed

The previously formulated finite element for lung mechanics (MSCL) by the author is extended to include airflow and molecular transport by diffusion. The lung mechanics is analyzed in detail providing an insight into the deformation of the microstructural elements. Also, some refinements are introduced with respect to the previous model. Here, the ...

By Miloš Kojić

The biomechanical properties’ changes of the abdominal aortic aneurysms’ (AAA) walls are closely related to the pathological degeneration of the smooth muscle cells and the main fibrous components (collagen and elastin). In this study, the passive mechanical response of the aneurysmal aortic wall is computation...

By Bouteraa Samira, Bouaricha Amor, Zemouri Zahia, Berkani Mahièddine

The determination of the total aerodynamic load which negatively influences the movement of artillery projectiles is inevitable and indispensable in order to be able to increase or control their ranges. The main part of this aerodynamic load that has the most influence on projectile movement is the drag force, which acts in the opposite direction t...

By Abdellah Ferfouri, Toufik Allouche, Damir D. Jerković, Nebojša Hristov, Milan Vučković, Abdeselem Benmeddah

This study presents a numerical and analytical prediction of delamination of a repaired joint due to a defect in the composite under tensile loading. The three-dimensional finite element method is used to predict the delamination of a repaired plate with the VCCT method. The effects of the position of the delamination, percentage of the delaminated...

By Sofiane Talbi, Mokadem Salem, Belaïd Mechab, Tewfik Ghomari, Ahmed Allem, Mohammed Khalil Salem, Belabbes Bachir Bouiadjra

In this paper, we propose a valveless micropump with an improved inlet/outlet channel configuration for biomedical applications. To do so, we added curved parts known as "ears" to a standard diffuser/nozzle shape. This new design will enlarge the flow rate values between both directions for the purpose of improving the valveless micropump efficienc...

By Ahmed Slami, Sofiane Soulimane

The results of a computational experiment on the analysis of the effectiveness of placing stiffeners on the outer side of the shell structure are presented. The calculations were carried out on the basis of a geometrically nonlinear mathematical model that takes into account transverse shears and orthotropy of the material. The calculation algorith...

By Alexey Semenov

In this paper, a numerical investigation using the finite element method on the cooling capacity of an electronic heat sink has been presented. This heat sink is intended for cooling applications of micro-computer CPUs. It deals with a parallelepipedal block with rectangular fins, filled with a nanofluid and crossed by four cylindrical pipes in whi...

By Yamina Anouar, Abderrahim Mokhefi

Considering the important role of small parameter perturbation term in mechanical systems, the perturbed dynamic differential equations of Lagrange systems are established. The basic idea and method of solving ordinary differential equations by normal renormalization group method are transplanted into a kind of Lagrange mechanical systems, the reno...

By Zheng Mingliang

The difficulties associated with thrust-optimized contour nozzles have led to significant advances in our knowledge of the physical phenomena associated with flow separation. In this study, a fully implicit scheme is implemented using a combined weight function for splitting the flux to analyze the shock patterns in the optimized contour (TOC) that...

By Bensayah Khaled, Kamri Khadidja