
handle: 10803/461500 , 10256/15006
The threat of impact on laminated composite structures has been a serious concern in the aerospace industry and scientific community because the compression load-carrying capacity of the structures, namely Compression 1/2 After Impact (CAI) strength, is severely impaired. The CAI strength reduction can reach as high as 60% for a typical advanced composite made of unidirectional carbon fibre laminae. The starting hypothesis of this thesis is that it is possible to improve the CAI strength by properly designing their layup, known as stacking sequence. Due to the complex impact damage morphology, little is known about how to tailor such a stacking sequence. Contributing to this research line is the single aim of this PhD thesis
Els impactes de baixa velocitat en estructures de materials compostos representen una greu amenaça per a la indústria aeroespacial i és un tema d'interès per a la comunitat científica pel fet que deterioren la resistència a compressió (CAI). La reducció de resistència pot arribar fins al 60% per a un material compost avançat típic de làmines unidireccionals de fibra de carboni. La hipòtesi que dóna peu a aquesta tesi és que és possible millorar la resistència a compressió després d'impacte dissenyant adequadament la seqüència d'apilament. A causa de la complexa morfologia del dany per impacte, se sap poc sobre com definir tal seqüència. Contribuir a aquesta línia d'investigació és l'únic objectiu d'aquesta tesi doctoral
53, Impacte, Finite element analysis, 53 - Física, 620 - Assaig de materials. Materials comercials. Economia de l'energia, 620, Impacto, Impact, Non-destructive inspection, Damage mechanisms, Ensayo no destructivo, Análisis de elementos finitos, Compression after impact, Assaig no destructiu, Mecanisme de danys, Anàlisi d'elements finits, Compressió després de l'impacte, Compresión después de impacto, Mecanismo de daños
53, Impacte, Finite element analysis, 53 - Física, 620 - Assaig de materials. Materials comercials. Economia de l'energia, 620, Impacto, Impact, Non-destructive inspection, Damage mechanisms, Ensayo no destructivo, Análisis de elementos finitos, Compression after impact, Assaig no destructiu, Mecanisme de danys, Anàlisi d'elements finits, Compressió després de l'impacte, Compresión después de impacto, Mecanismo de daños
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