Surface and inter-phase analysis of Composite Materials using Electromagnetic Techniques based on SQUID Sensors

Bonavolontà, Carmela (2006) Surface and inter-phase analysis of Composite Materials using Electromagnetic Techniques based on SQUID Sensors. [Tesi di dottorato] (Inedito)

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Abstract

In this thesis an electromagnetic characterization and a non-destructive evaluation of new advanced composite materials, Carbon Fiber Reinforced Polymers (CFRP) and Fiber-Glass Aluminium (FGA) laminates, using an eddy-current technique based on HTS dc-SQUID (Superconductive QUantum Interference Device) magnetometer is proposed. The main goal of this thesis is to propose a prototype based on a superconducting sensor, such as SQUID, to guarantee a more accuracy in the quality control at research level of the composite materials employed in the aeronautical applications. A briefly introduction about the superconductivity, a complete description of the SQUID properties and its basic working principles have been reported. Moreover, an overview of the most widely used non destructive technique employed in several industrial and research fields have been described. Particular attention is given to the eddy current testing and the technical improvement obtained using SQUID in NDE. The attention has been focused on two particular application, that are the main topics of this thesis. The first concerns with the investigation of the damage due to impact loading on the composites materials, and the second is the study of the corrosion process on the metallic surface. The electrical and mechanical properties of the tested advanced composite materials, such as Carbon Fiber Reinforced Polymers (CFRPs) and Fiber-glass Aluminium (FGA) laminates are investigated. The experimental results concern the non-destructive evaluation of impact loading on the CFRPs and FGA composites, by means of the electromagnetic techniques; the investigation of the electromechanical effect in the CFRPs using the SQUID based prototype and the AFM analyses; and the study of corrosion activity of the metallic surface using magnetic field measurements

Tipologia di documento:Tesi di dottorato
Parole chiave:Composite Materials, SQUID, Eddy Current
Settori scientifico-disciplinari MIUR:Area 09 Ingegneria industriale e dell'informazione > ING-IND/24 PRINCIPI DI INGEGNERIA CHIMICA
Coordinatori della Scuola di dottorato:
Coordinatore del Corso di dottoratoe-mail (se nota)
Grizzuti, Nino
Tutor della Scuola di dottorato:
Tutor del Corso di dottoratoe-mail (se nota)
Valentino, Massimo
Stato del full text:Accessibile
Data:2006
Numero di pagine:188
Istituzione:Università degli Studi di Napoli Federico II
Dipartimento o Struttura:Ingneria chimica
Tipo di tesi:Dottorato
Stato dell'Eprint:Inedito
Denominazione del dottorato:Ingegneria Chimica dei Materiali e della Produzione
Ciclo di dottorato:XVIII
Numero di sistema:597
Depositato il:30 Luglio 2008
Ultima modifica:04 Febbraio 2009 09:38

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