With the aim of optimizing the traditional construction process of a fiber-reinforced lattice structure, the present study modified a previously proposed technique called “truss stacking and node gluing.” To explicitly investigate the structural compressive properties (compressive strength and compressive modulus under the flat pressure), the geometrical parameters, material properties, and topological configuration were examined in detail. Additionally, the present study conducted the relevant theoretical analyses to predict the possible destruction modes and compressive properties. All the samples were tested with a universal testing machine at a rate of 2 mm/min using the ASTM-C365 standard. The results showed that compressive properties are positively related to the relative density and negatively related to the aspect ratio. It was also found that the compressive performance for different materials was in the following order (from good to bad): cotton-fiber reinforced epoxy composite (CREC), jute-fiber reinforced epoxy composite (JREC), and nylon-fiber reinforced epoxy composite (NREC). Furthermore, the mixed topological structure performed as well as the square structure, and they both overmatched the diamond structure. Lastly, the accuracy of the theoretical analysis was evaluated by comparing the theoretical values and the experimental values.

Textural, mineralogical and chemical characterization of archaeological ceramics (zellige) from El Badi Palace (Marrakech, Morocco), the main Islamic monument from the Saadian period (sixteenth century), has been performed to enhance restoration and to determine the technology of manufacturing. A multi-analytical approach based on optical and scanning electron microscopy, cathodoluminescence, X-ray fluorescence and X-ray diffraction was used. Re-firing tests on ceramic supports were also performed to determine the firing temperatures used by the Saadian artisans. A calcareous clay raw material was used to manufacture these decorative ceramics. The sherds were fired at a maximum temperature of 800°C in oxidizing atmosphere. The low firing temperature for ‘zellige’ facilitates cutting of the pieces, but also causes fragility in these materials due to the absence of vitreous phases.

La simulation du comportement dynamique d'un système usinant conduit à la résolution d'un problème non-linéaire de vibrations où la modélisation de l'interaction outil/pièce joue un rôle central.Cette interaction a pour particularité d'évoluer au cours du temps suite à une modification régulière de la frontière du domaine pièce qui correspond à l'enlèvement progressif de matière. La flexibilité de la pièce complique très nettement son évaluation. L'objectif principal de ce travail est de proposer une démarche permettant de faire évoluer,tout au long de l'usinage, le modèle géométrique décrivant la surface usinée dans un contexte de pièce déformable.Les différents modèles nécessaires à la simulation du comportement dynamique du système usinant sont présentés ainsi que la démarche adoptée pour modéliser l'interaction outil/pièce. Deux exemples simples montrent l'intérêt de la méthode.