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Abstract(s)
Nos últimos anos temos assistido a um rápido crescimento do uso de materiais compósitos reforçados com fibras em aplicações de engenharia, e esta tendência tenderá a aumentar ainda mais. Este fenómeno ocorre em particular nas indústrias automóvel, aeronáutica e naval onde o uso de materiais compósitos laminados está associado à redução de peso e consequente economia de combustível. No entanto, a sensibilidade destes materiais a cargas de impacto é ainda um sério obstáculo à sua utilização generalizada. Por outro lado, nestas aplicações estes materiais estão sujeitos a vários ambientes hostis promovendo, deste modo, a sua degradação.
Neste contexto, o presente trabalho foi elaborado em colaboração com a empresa Nelo e visa a melhoria da resistência ao impacto de laminados usados na construção de kayaks através do reforço da matriz com pó de cortiça. Posteriormente efetuou-se um estudo exaustivo da degradação destes materiais, em termos de resistência ao impacto, para vários ambientes hostis.
In recent years, there has been a rapid growth in the use of fibre reinforced composite materials in engineering applications and this will be continuing. Particularly, in the automotive, aerospace and naval industries the use of composite laminates is associated with the reduction of weight and consequent fuel saving and improvement in performance. However, the sensitivity of those materials to impact loads is a serious obstacle to their widespread use. On the other hand, in such applications these materials are subjected to various hostile environments promoting therefore its degradation. In this context, this work was done in collaboration with the company Nelo and aims to improve the impact resistance of laminates used in building kayaks through enhanced matrix by cork powder. Subsequently, it was performed an exhaustive study of the degradation, in terms of impact strength, for several hostile environments.
In recent years, there has been a rapid growth in the use of fibre reinforced composite materials in engineering applications and this will be continuing. Particularly, in the automotive, aerospace and naval industries the use of composite laminates is associated with the reduction of weight and consequent fuel saving and improvement in performance. However, the sensitivity of those materials to impact loads is a serious obstacle to their widespread use. On the other hand, in such applications these materials are subjected to various hostile environments promoting therefore its degradation. In this context, this work was done in collaboration with the company Nelo and aims to improve the impact resistance of laminates used in building kayaks through enhanced matrix by cork powder. Subsequently, it was performed an exhaustive study of the degradation, in terms of impact strength, for several hostile environments.
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Keywords
Compositos híbridos Materiais compositos Impacto ambiental Comportamento mecânico