[en] FMLs are hybrid composite materials built up from interlacing layers of thin metals and composites that were created in the aeronautical sector in order to combine the advantages of composites and metals. The main disadvantage of traditional FMLs lies in the long curing process of the matrix. Recently self-reinforced polymer materials have been used as an alternative to the traditional composites employed in FMLs. They provide superior energy absorption capacity and recyclability, among others. Furthermore, these FMLs could show higher damping capacity than traditional FMLs due to the thermoplastic nature of the composite. Additionally, the effect of viscoelasticity is more pronounced in thermoplastic materials, being the frequency one of the most influential factor. Considering the ever increasing demand for lighter vehicles, and based on the advantages mentioned before, self-reinforced thermoplastic based on FMLs may be an alternative to traditional FMLs in sectors such as automotive of land-based transport. Thus, it is considered that the study of the dynamic behaviour of the FMLs based on self-reinforced thermoplastics is of great interest. In this thesis, an experimental and numerical study of the dynamic behaviour of FMLs based on self-reinforced thermoplastics has been carried out. First, the self-reinforced thermoplastics has been characterised considering the orthotropy and the frequency dependence. In this way, the complex Young's modulus the complex Poisson's ratio and the complex shear modulus has been characterised. Next, the characterisation of the FML based on the self-reinforced thermoplastic has been carried out and the results have been compared to both traditional FML and aluminium. Finally, the dynamic behaviour of the FML based on self-reinforced thermoplastic has been analysed numerically where afterwards these results have been correlated with the experimental results.

[eu] Zuntz-metal laminatuak (Fibre Metal Laminates, FML), material konposatu eta metal laminak tartekatuz osatutako laminatuak dira, material konposatu eta metalek eskaintzen dituzten abantailak konbinatzeko helburuarekin aeronautika sektorean sortuak. FML hauen desabantaila nagusia, material konposatuaren matrizeak behar duen kuratze prozesu luzea da. FML tradizionaletan erabiltzen diren material konposatuen alternatiba gisa, azken urte hauetan termoplastiko auto-indartuak erabiltzeari ekin zaio, izan ere absortzio gaitasun eta birziklagarritasun hobea baitute, besteak beste. Bestalde, FML hauek moteltze gaitasun handiagoa eskaintzea posible izango litzateke, bertako material konposatuaren izaera termoplastikoagatik. Horretaz gain, biskoelastizitate efektua nabarmenagoa da material termoplastikoetan, frekuentzia izanik eragin handienetako faktore bat. Gero eta ibilgailu arinagoen eskaera kontsideratuz eta aurrez azaldutako abantailak kontuan izanik, termoplastiko auto-indartuz osatutako FML-ak FML tradizionalen alternatiba izan daitezke automobilgintzan edo tren-industrian. Hau dela eta, termoplastiko auto-indartuz egindako FML-aren portaera dinamikoa aztertzea interes handikoa dela kontsideratu da. Horregatik, tesi honetan termoplastiko auto-indartuz osatutako FML-en portaera dinamikoa aztertu da bai modu esperimentalean bai modu numerikoan ere. Lehenengo eta behin, termoplastiko auto-indartuaren karakterizazioa egin da bere ortotropia eta frekuentziarekiko menpekotasuna kontuan hartuta. Horrela, Young-en modulu konplexua, Poisson-en koefiziente konplexua eta ebakidura modulu konplexua karakterizatu dira, frekuentziaren eragina kontuan izanik. Jarraian, termoplastiko autoindartuarekin osatutako FML-a karakterizatu da, non lortutako emaitzak FML tradizional batenarekin eta aluminioarenarekin alderatu diren. Azkenik, termoplastiko auto-indartuz osatutako FML-aren portaera dinamikoaren simulazio numerikoa egin da eta ondoren emaitza hauek esperimentalki lortutakoekin korrelatu dira.