|Tipo di tesi||Tesi di dottorato di ricerca|
|Titolo||Metodologia di progettazione di componenti in materiale composito CFRP mediante tecniche di ottimizzazione strutturale|
|Titolo in inglese||Design methodology for CFRP components involving structural optimization techniques|
|Settore scientifico disciplinare||ING-IND/14 - PROGETTAZIONE MECCANICA E COSTRUZIONE DI MACCHINE|
|Corso di studi||INGEGNERIA INDUSTRIALE E DEL TERRITORIO|
|Data inizio appello||2017-03-20|
|Disponibilità||Accessibile via web (tutti i file della tesi sono accessibili)|
I materiali compositi offrono nuove possibilità in termini di performance dei componenti; il loro impiego è ormai consolidato in quasi tutti i settori industriali.
Composite materials grant us novel possibilities in terms of component performance, hence they are nowadays widely employed in the most of the industrial fields. In particular, the automotive industry tends to replace metal components with their composite material counterpart to reduce weight and increase performance. Amongst the commercially available materials, carbon long fiber reinforced plastics are the most suitable for reaching structural stiffness and strength targets. The design of composite material parts is a particularly complex task since the material itself introduces a wide set of design choices. In order to obtain any noteworthy gain in performance, the optimal combination of fiber and matrix material, fabric properties, ply orientation and stacking sequence has to be defined. The usual methodology based on trial and error iterations directed by the designer experience and know-how may reveal itself slow in reaching an optimal design; being this the case, it is necessary to resort to computationally assisted optimization methods. This thesis examines a design approach complementary to the traditional procedure that takes advantage of the structural FEM optimization techniques, applied to composite materials. The purpose of this thesis is to define a standardized design methodology tailored to be straightforwardly applied to the industrial practice, where the timing is increasingly stringent. In particular, such methodology strives for achieving the optimal performance since its initial steps. Both the methodologies are illustrated and compared, then the focus moves to the new design through optimization procedure, which is presented in detail with reference to the actual test case of a carbon fiber bonnet. Amongst the available optimization methods, some of them may be directly applied to the task of designing composite material parts, whilst others require a conceptual adaptation. In practical applications, specific nonlinear analyses are required for component dimensioning and validation. Due to the time consuming nature of this activity, and the chance that a re-design may be required, the most appropriate timing for the inclusion of this validation stage has to be determined. The test case of the design flow for a carbon fiber wing is presented.