7 research outputs found
Identification of Behaviour Laws and Failure Criteria Parameters of Composites Based on Off Axes Tests Application : Composite Polyester/Alfa
Mathematical Modeling of an Active-Fiber Composite Energy Harvester with Interdigitated Electrodes
The use of active-fiber composites (AFC) instead of traditional ceramic piezoelectric materials is motivated by flexibility and relatively high actuation capacity. Nevertheless, their energy harvesting capabilities remain low. As a first step toward the enhancement of AFC’s performances, a mathematical model that accurately simulates the dynamic behavior of the AFC is proposed. In fact, most of the modeling approaches found in the literature for AFC are based on finite element methods. In this work, we use homogenization techniques to mathematically describe piezoelectric properties taking into consideration the composite structure of the AFC. We model the interdigitated electrodes as a series of capacitances and current sources linked in parallel; then we integrate these properties into the structural model of the AFC. The proposed model is incorporated into a vibration based energy harvesting system consisting of a cantilever beam on top of which an AFC patch is attached. Finally, analytical solutions of the dynamic behavior and the harvested voltage are proposed and validated with finite element simulations
Avulsions traumatiques des dents permanentes
L’avulsion dentaire traumatique constitue une urgence. En denture permanente, elle fait
appel, le plus souvent, à la réimplantation. Aujourd’hui les conditions permettant le
succès thérapeutique des réimplantations sont connues : il s’agit principalement des
conditions de conservation et du temps extra-alvéolaire de la dent expulsée ainsi que des
techniques de réimplantation et de contention qui lui sont appliquées. Cet article a pour
objectif de faire le point sur les données actuelles de la littérature concernant le
traitement des dents permanentes avulsées, la gestion des complications associées à ce
traumatisme, ainsi que les moyens permettant de les prévenir ou d’en limiter les
séquelles
New three-dimensional model based on finite element method of bone nanostructure: single TC molecule scale level
Finishing and quality of mechanically brushed 316L stainless steel welded joints using MIG process: hardness modeling by L9 TAGUCHI design
Improvement of viscoelastic damping by using manganese bronze with indium
10.1007/s11043-013-9223-3Mechanics of Time-Dependent Materials181217-22