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- Structural improvements of a FishBAC designPublication . Nunes, Tiago Emanuel PereiraThe aeronautical industry is well known for its high demands. Nowadays, the demands are higher and more visible, which leads to the active search for new ideas and solutions that are innovative, creative and more efficient for the continuous evolution of the aircraft’s performance. One of these new and promising ideas is the Fish Bone Active Camber (FishBAC) wing, which is a type of camber morphing wing. This dissertation work proposes new solutions that aim to mitigate the limitations of the current models of the FishBAC technology. As a compliance-based morphing mechanism, the distribution and orientation of stiffness within the FishBAC are incredibly important. The overall goal is to achieve high compliance in the camber morphing direction while maintaining high stiffness in the other directions. The geometry of the FishBAC is designed to create a high level of structural anisotropy. This work seeks to push this structure further by investigating a series of design changes that will further augment the material and geometric anisotropy in order to increase the performance of the FishBAC. These solutions were obtained using three different models. The first model presents a spine with rectangular cutouts. The second one has Carbon Fibre Reinforced Polymer (CFRP) pultrusions attached to the stringers next to the skin. The third model combines the characteristics of the other two. The results obtained through the Finite Element Analysis (FEA) for these models, were compared to a basic FishBAC model with no modifications. This process helped to conclude, that cutouts have a positive effect in diminishing the stiffness of the model with a modest impact in deflection variation along the wingspan. The CFRP pultrusions have been demonstrated to be much less effective to respond to this deflection variation problem than it was expected. Keywords: FEA, CAD, Morphing wing, FishBAC, CFRP.