The subject aims to introduce the student to the design of mechanical and automotive structure with the particular target of lightweight. Lightweight targets can be pursued by using recently developed steels of the families of HSS and UHSS, by using light weight metallic alloys such as Aluminum or by using Fiber Reinforced Plastic such as Composite materials. Some times multi-material structures are considered, taking advantage from the particular properties and manufacturing technologies adopted to make mechanical components. The subject will in particular concentrate on the design with composite materials. Further some basic on the joining technique for multi-material structure will be introduced, with particular attention to adhesive joining. It is expected to develop some experimental lab activities. It is expected to have application testimonials from relevant industries.

To understand the need of lightweight, with particular reference to vehicles To compare the different properties of the materials, the related design procedure and manufacturing process To understand the mechanics of orthotropic materials To experimentally characterize composite materials

Machine Design.

1 – introductory notes on lightweight design and of different types of materials that can be adopted from HS steel and UHS stell, to light alloys to reinforced plastics 2 - classification of composite materials, typical matrix and typical reinforcing fibers 3 – micro-mechanical behaviour of the fiber reinforced composite material 4 – mechanical behaviour of composite lamina – orthotropy, stiffness and strength 5 – mechanical behaviour of composite laminate – constitutive equations, stiffness and interlaminar stress 6 – analysis of the material strength under complex loading conditions 7 – numerical modeling methodologies (FEM) 8 – design methodologies, joining of composite parts 9 – experimental test 10 – fatigue behaviour and impact behaviour of composite materials

Class hours will be equally subdivided in lectures and tutorials. During tutorials It is expected to develop some experimental lab activities. Results of the class exercises and of the Lab test are to be collected by each student in reports to be presented and discussed during the final exam.

1 – Tsai S. – Theory of Composite Design 2 – Halpin J.C. (1992) - Primer on composite materials analysis, Technomic 3 – Gay D., Hoa S.V. (2007) - Composite materials : design and applications - CRC 4 – Belingardi G. – notes and slides

Dispense;

Modalità di esame: Prova orale obbligatoria; Elaborato scritto individuale;

Exam: Compulsory oral exam; Individual essay;

... The final exam is finalized to assess the knowledge gained by each of the students on the subjects developed during lectures and tutorials. Final exam will consist in an oral exam dealing with the subjects developed during lectures and tutorials. Results of the class exercises and of the Lab test, collected by each student in reports, will be discussed and evaluated during the final exam in order to get a comprehensive assessment with respect to the said course targets.

Gli studenti e le studentesse con disabilità o con Disturbi Specifici di Apprendimento (DSA), oltre alla segnalazione tramite procedura informatizzata, sono invitati a comunicare anche direttamente al/la docente titolare dell'insegnamento, con un preavviso non inferiore ad una settimana dall'avvio della sessione d'esame, gli strumenti compensativi concordati con l'Unità Special Needs, al fine di permettere al/la docente la declinazione più idonea in riferimento alla specifica tipologia di esame.