The present article is connected to the study of a bituminous mixture (BM) material, used on modern railway track as sub-ballast layer. Influence of size and volume fraction of rigid monodisperse spherical inclusions, randomly packed into a hyperelastic matrix, on the mechanical behavior of an obtained composite structure was investigated using ‘‘V...
In the current study, a theoretical method is developed to predict the vibrational behavior of micro-circular disks filled with viscous fluids and numerical results are presented to validate the model. Vibrations with two outer boundary conditions, rigid and deformable vessel, are studied. The coupled governing equations of both rigid and deformabl...
Hollow sphere structure (HSS) belongs to cellular solids that have been studied recently for its multiples properties. In our case, HSS aims to absorb soft impacts energy on an airliner cockpit. This structure is investigated because of its promises in term of specific energy dissipated (J.kg1) during impact. First of all, quasi- static and dynamic...
La majorité des patients atteints d'un cancer sont soignés par la technique de la radiothérapie, l'une des trois principales modalités de traitement avec la chirurgie et la chimiothérapie. Elle consiste en la délivrance d'une radiation de haute énergie sur un volume cible. Son but est de détruire les cellules cancéreuses sans endommager les tissus ...
Le thème des grandeurs et mesures à l'école primaire en France est un thème partagé entre l'enseignement des mathématiques et celui des sciences expérimentales. Son importance réside dans sa participation à la construction du concept du nombre chez les jeunes élèves, et à la compréhension de la nature des sciences et de la démarche expérimentale. D...
Dynamic fracture mechanism in Polyamide 11 (PA11) material has been described at laboratory scale to access to an intrinsic material parameter. A liquid transportation application is considered with polymer pipes. A preliminary numerical analysis of the rapid crack propagation (RCP) in polymer pipe is firstly realised. Two boundary conditions, impo...
In a global context of energy saving, the ratio stiffness – mass is a key parameter for design of mechanical structures. To deal with this major concern, sandwich materials are finding an increasing use: the skins are designed to resist tensile and compressive stresses while the core needs to gather lightweight, shear stresses resistance and high m...
Highlights • A numerical analysis on a C-class-like geometry is performed in unsteady wind conditions at different wind frequencies. • LES and URANS models agree in predicting the global aerodynamic coefficients as well as the flow structures of the wingsail. •Stall cells appear on the wingsail in case of unsteady wind conditions and their features...
Thermally Activated Building Systems (TABS) are difficult to control due to the time lag between the con- trol sending and the response of the indoor temperature. Energy management of systems having such a high inertia can be improved by optimizing the restart time thanks to both occupancy and weather antic- ipation. Predictive control is suitable ...
