The acoustic behavior of 3D printed micro-lattices is investigated to assess the impact of defects induced by the Fused Deposition Modeling technique on the parameters of the equivalent uid medium. It is shown that manufacturing process leads to three types of non-trivial defects: elliptical lament sections, pinch and laments surface rugosity. Not ...
Une chaine de modélisation dynamique, couplant le modèle de trafic dynamique Symuvia (LICIT, Ifsttar / ENTPE) et l’outil de prédiction des niveaux sonores Noisemodelling (UMRAE, Ifsttar / Cerema), est constituée dans cet article pour évaluer l’impact du trafic routier sur les environnements sonores à l’échelle d’un réseau de trafic urbain d’environ...
In this paper, some guidelines are provided in order to predict at which frequency the 1 st performance peak (related to periodicity effects: half of the wavelength = periodicity dimension) appears, together with its amplitude, as functions of the unit cell dimensions. Conversely, also the link between the unit cell dimensions and the 1 st performa...
Computational optimization algorithms coupled with acoustic models of wind instruments provide instrument makers an opportunity to explore new designs. Specifically, they give the possibility to automatically find geometries exhibiting desired resonance characteristics. In this paper, the design optimization of woodwind instruments with complex geo...
The ability of an adaptive ultrasonic imaging procedure to inspectinside unknown anisotropic nuclear steels, such as V-shape welds or cladded components, is investigated herein. Theoptimization scheme combines the Total Focusing Method (TFM) imaging algorithm with a customizedgradient ascent method in order to improve both the quality and reliabili...
Published in Journal of the mechanical behavior of biomedical materials
The fracture mechanics (FM) parameters of cancellous bone tissues are very important from a clinical point of view especially for the bone cement augmentation. From the literature review, one can observe that the experimental determination of fracture mechanic parameters of cancellous bone are still lacking. This can be due to the conditions associ...
This paper investigates the deformation processes operating in α grains of Ti-6Al-4V submitted to fatigue and dwell-fatigue loadings at room temperature. With this aim, mechanical tests were interrupted after a given number of cycles or cumulated plastic strain. Slip traces analysis combined with electron back-scattered diffraction enabled to evide...
We report a comprehensive study on the structure and elastic constants of epitaxial cubic δ-TaxN (x ≈ 1) layers deposited by reactive magnetron sputtering at 570 °C on MgO(001), MgO(110) and MgO(111) substrates. X-ray diffraction shows that all layers are single-phase and have a single-crystal rocksalt-structure, growing with an epitaxial cube-on-c...
The quality of robotic dexterous manipulation, in real or in virtual environments, relies on a fine control of the fingertips to perform stable grasps and inside-hand manipulation. In practice, teleoperating a robotic hand requires to capture the human hand configuration. If the user manipulates objects with fingertips, the acquisition of their mot...
A shape optimization for tonal noise generated aerodynamically at low Mach number is performed for a cylinder with polygonal cross-section. Acoustic quantities are derived from a hybrid analytical formula, with aeroacoustic sources obtained from the incompressible solution of the direct Navier-Stokes equations in 2D at Re = 150; the solid domain is...
