RevistaComposites Part B: Engineering
Año de publicación2016
Polímeros y compuestos
Fatigue behavior enhancement of short fiber glass reinforced polyamide by adding phase change materialsCasado del Prado, José Antonio | Gutiérrez-Solana Salcedo, Federico | Carrascal Vaquero, Isidro Alfonso | Diego Cavia, Soraya | Polanco Madrazo, Juan Antonio | Hernández Manrique, David |
High responsibility thermoplastic components subjected to dynamic forces show serious in-service thermal limitations. This paper shows that adding the adequate material with a phase-change, PCM, to a thermoplastic matrix component significantly increases its fatigue life. To do this, the fatigue resistance of short fibre-glass reinforced polyamide is analysed by means of monotonous fatigue tests on tensile specimens. Next, the design of the pieces of this material, used in high-speed rail fastenings, is optimised for fatigue efforts by means of accelerated single-piece tests. Finally, it is verified that the fatigue resistance of these pieces endowed with hydrated salt, Na2S2O3·5H2O, which acts as a PCM, increases by a surprising 400% with respect to the reference pieces without PCM.