Search results for " costruzione."
showing 10 items of 477 documents
“A Miracle of Architecture”: The Billiemi limestone Columns of the Church of San Giuseppe dei Teatini in Palermo and Domenico Fontana’s Method for Li…
2014
La chiesa di San Giuseppe dei Teatini di Palermo (costruita a partire dal 1619), è un’architettura singolare nel panorama internazionale del Sei-Settecento. La realizzazione di una spregiudicata conformazione basilicale con copertura a volte, impostata su una sequenza di colonne monolitiche giganti nelle navate e nella crociera con cupola con sostegni alti fino a 10m, è il risultato della convergenza di più fattori. Il conseguimento di questo traguardo si deve alla scoperta nel territorio di Palermo, alla fine del XVI secolo, di un calcare compatto (il “Billiemi”) dalle qualità estetiche e strutturali assimilabili al marmo e in grado di generare poderosi monoliti. Questa opportunità innescò…
DEVELOPMENT OF AN ANTHROPOMORPHIC MODEL FOR VEHICLE – PEDESTRIAN CRASH TEST
2009
The purpose of this work is the achievement of an anthropomorphic model for the virtual simulation of pedestrian – vehicle crash test. “Dummy” construction in Visual Nastran room does possible the preparation of crash test with several vehicle models. Its three-dimensional geometry is implemented by video animation software, extracting the geometry element for element, and its characteristics are in keeping with EURONCAP protocol. Every bodily segment properties are determined using the reference material on the movement biomechanics. At last fall tests from three different heights are simulated for the “Dummy” validation, obtaining a reliable result.
MANUTENZIONE DELL’AMBIENTE COSTRUITO: QUANTO RESTA DELLA NOTTE?
2021
Confrontando la manutenzione dell’ambiente costruito con la stessa attività riferita, in genere, ai prodotti manifatturieri, importanti caratteristiche specifiche emergono, sia nelle tecnologie di processo che di prodotto. Infatti, per le costruzioni lo stretto legame tra manutenzione e qualità acquisisce, in più, notevoli implicazioni di ordine sociale e collettivo, sia se applicata a edifici e spazi pubblici, sia se riferita all’edilizia residenziale privata. Nonostante ciò, tenendo conto della tendenza al “constructuring” che sembra indirizzare il futuro dell’edilizia sotto gli influssi della digitalizzazione, è ugualmente utile tener presente gli avanzamenti nel campo della manutenzione…
Index-based triangulation method for efficient generation of large three-dimensional ultrasonic C-scans
2018
The demand for high-speed ultrasonic scanning of large and complex components is driven by a desire to reduce production bottlenecks during the non-destructive evaluation (NDE) of critical parts. Emerging systems (including robotic inspection) allow for the collection of large volumes of data in short time spans, compared to existing inspection systems. To maximise throughput, it is crucial that the reconstructed inspection datasets are generated and evaluated rapidly without loss of detail. This requires new data visualisation and analysis tools capable of mapping complex geometries while guaranteeing full coverage. This paper presents an entirely new approach for the visualisation of thre…
Stress Transfer within CNT Fibres: A FEA Approach
2015
Abstract Carbon nanotube (CNT) fibres are characterized by extreme anisotropy in their structure and physical properties. These fibres have been shown to have high axial strength, but poor shear strength between carbon nanotubes; for this reason it is difficult to transfer stress uniformly acrossthe fibre cross section. Here, Finite Element Analysis (FEA) is used to predict the stress distribution and the stress-strain curves of CNT fibres. The resultsdemonstrate that, in accordance with St. Venant principle,very considerable length-to-diameter ratios (> 10 3 ) are required to obtain a uniform stress distribution within the fibres even in the presence of low applied strain.
INVESTIGATION OF THE INDENTATION BEHAVIOUR OF FOAM CORED LIGHTWEIGHT COMPOSITE SANDWICHES
2011
Il progetto di Giacomo Amato per il palazzo Statella dei marchesi di Spaccaforno a Palermo
2013
The project of Giacomo Amato for the Statella palace of the Marquis of Spaccaforno in Palermo. The essay documents the project of architectural reconfiguration of Statella palace in Palermo, a building of the sixteenth century, transformed by Giacomo Amato for prestigious aristocratic clients. The examination of archival documents, with the analysis of the original drawings, help to clarify the building history, the stages of the construction and especially the role of the architect in the process of reconfiguration of the building. The project and construction of the palace are documented by seven drawings autographs, preserved in the fourth volume of the collection of Amato’s drawings and…
Influence of compliance for an elastokinematic model of a proposed rear suspension
2014
The research is carried out to improve passenger’s comfort to increase the vehicles stability in dynamic conditions. The literature available in the automotive engineering considers different topics for studying suspensions. An example represents mechanisms structure and analysis (synthesis, kinematics, and dynamics) under various operating conditions. These aspects have been approached before analytically, numerical. The current paper studies the influence of the lateral force on the contact patch of the wheel and the corresponding variations of vehicle stability parameters, such as camber angle and wheel rear track. The study is performed for a newer innovative rear suspensions mechanism …
Optimization of the characteristic angles of both front and rear McPherson suspensions on a circular track using multi-body numerical simulation
2009
The research reported in this paper aims to simulate the road-holding of a virtual vehicle using multi-body simulation to estimate both the contact forces between the tyre and ground and the roll motion when cornering. Furthermore, the effect of the characteristic angles on the variation in the forces of the tyre in contact with the ground is studied to determine optimal values for these angles. Emphasis is placed on an average-class vehicle, of which both the external dimensions and mass are chosen appropriately, with a McPherson suspension mounted on both the front and the rear. The characteristic values of the camber and toe-in angles, in both the front and the rear, are optimized for m…
ANALISI DEL COMPORTAMENTO MECCANICO DI SANDWICHES GREEN COSTITUITI DA PELLI IN BIOCOMPOSITO E CORE IN BALSA/SUGHERO
2022
Negli ultimi anni l’aumento della sensibilità nei confronti della salvaguardia ambientale, anche attraverso apposite norme in materia di lotta all’inquinamento e di riciclo dei materiali a fine vita, ha portato ad un notevole interesse dei ricercatori verso i cosiddetti compositi green, materiali costituiti in genere da rinforzi di origine naturale e matrici “bio-based” a basso impatto ambientale. Una categoria interessante di materiali innovativi, caratterizzati da una elevata resistenza a flessione unita ad un basso peso specifico, è rappresentata dai cosiddetti sandwiches, costituiti in genere da robuste pelli in composito fibro-rinforzato e da un core in materiale molto leggero e poco r…