Search results for "Progettazione"
showing 10 items of 581 documents
Continuous monitoring of an intentionally-manufactured crack using an automated welding and in-process inspection system
2020
Abstract Automated weld deposition coupled with the real-time robotic Non-Destructive Evaluation (NDE) is used in this paper. For performance verification of the in-process inspection system, an intentionally embedded defect, a tungsten rod, is introduced into the multi-pass weld. A partially-filled groove (staircase) sample is also manufactured and ultrasonically tested to calibrate the real-time inspection implemented on all seven layers of the weld which are deposited progressively. The tungsten rod is successfully detected in the real-time NDE of the deposited position. The same robotic inspection system was then used to continuously monitor an intentionally-manufactured crack for 20 h.…
Ultrasonic phased array inspection of wire plus arc additive manufacture (WAAM) samples using conventional and total focusing method (TFM) imaging…
2018
In this study, three aluminium samples produced by wire + arc additive manufacture (WAAM) are inspected using ultrasonic phased array technology. Artificial defects are machined using a centre drill, ø3 mm, and electro-discharge machining (EDM), ø0.5-1 mm, in a cylindrical through hole topology. The sample was first inspected by a single element wheel probe mounted on a KUKA robot in order to investigate the feasibility of using a conventional ultrasonic transducer approach. Unfortunately, the wheel probe was found to be unsuitable for scanning of the WAAM specimens and ultrasonic phased arrays were employed next. The setup included 5 MHz and 10 MHz arrays (128 elements) in direct contact w…
Idee di società, progetti di quartiere
2009
Sul perché le descrizioni dipendono dalle intenzioni progettuali. Possibili letture dei territori della dispersione
2008
Secchi (1996) afferma che descrivere e interpretare sono operazioni altamente selettive che concorrono alla costruzione del progetto. Altresì Vettoretto (!994) ribadisce la non neutralità di tali operazioni che rivelano, invece, le "intenzioni" progettuali. Il saggio raccoglie alcune descrizioni/interpretazioni elaborate sulla dispersione insediativa che mettono in luce i differenti approcci progettuali degli autori.
OTTIMIZZAZIONE FLUIDO-MECCANICA DI TURBINE IDRAULICHE CROSSFLOW
2021
Evoluzione e integrazione degli strumenti di valutazione ambientale Via, Vas, Vinca
2012
Il contributo affronta il tema della nascita, evoluzione e consolidamento degli istituti di valutazione ambientale denominati Via, Vas e Vinca.
SVILUPPO DI METODOLOGIE DI PROGETTAZIONE INTEGRATA PER BARCHE A VELA DA COMPETIZIONE
2021
In questo lavoro di tesi sono presi in esame i metodi di progettazione integrata con riferimento al disegno nautico delle piccole imbarcazioni a vela da competizione. La progettazione di una barca a vela, in tutte le sue parti, è un processo molto complesso in quanto richiede una profonda esperienza in questo campo ed inoltre necessita di diverse competenze dal punto di vista tecnico in aree anche molto distanti tra loro. Nella vita di tutti i giorni spesso risolviamo problemi relativamente semplici e quindi troviamo la soluzione anche in modo intuitivo, in ingegneria solitamente si affrontano problemi un po’ più complessi e seguire una procedura strutturata aiuta molto per trovare soluzion…
Projective Architecture
2009
Sbacchi indaga su quale sia stata la reale influenza della nozione di "proiezione" nell'ambito della progettazione architettonica a partire da Guarini. Per fare ciò vengono presi in considerazione i concetti di luce e ombra così come quelli di linea astratta, piano, sezione, geometria proiettiva e prospettiva. Michele Sbacchi investigates the real influence of the notion of projection on architectural design before and during the age of Guarini. He takes into consideration concepts such as light and shadow, abstract line, plane, section, projective geometry and perspective. To do this he looks at the ideas of Gregorius Saint Vincent, Alberti, Guarini, Desargues and de l’Orme, among others.
Experimental determination of mode I fracture parameters in orthotropic materials by means of Digital Image Correlation
2020
Abstract The mode I fracture parameters for an orthotropic body are directly calculated from full-field deformation measurements provided by Digital Image Correlation (DIC). Three complementary and direct approaches are evaluated and compared: (i) the determination of the Stress Intensity Factor (SIF) by fitting the displacement field using the analytical expression proposed by Lekhnitskii; (ii) the determination of the J-Integral by using the Energy Domain Integral (EDI) formulation on the raw DIC data; and (iii) the calculation of the J-Integral using the EDI approach on the displacement data fitted using Lekhnitskii’s formulation. A comparative experimental study is performed by testing …
Effects of mechanical deformation on electronic transport through multiwall carbon nanotubes
2017
Abstract The effects of mechanical deformation on the electron transport behavior of carbon nanotubes (CNTs) are of primary interest due to the enormous potential of nanotubes in making electronic devices and nanoelectromechanical systems (NEMS). Moreover it could help to evaluate the presence of defects or to assess the type of CNTs that were produced. Conventional atomistic simulations have a high computational expense that limits the size of the CNTs that can be studied with this technique and a direct analysis of CNTs of the dimension used in nano-electronic devices seems prohibitive at the present. Here a novel approach was designed to realize orders-of-magnitude savings in computation…