Documents published in Scipedia

• Evaluation of dissimilar titanium-composite joints for the manufacture of high-performance aeronautical structures

  M. Román Rodríguez, C. Builes, E. Senín, M. Coto, A. González

  Materiales Compuestos (Online first).

  
  

  Abstract

  One of the main objectives of the CAELESTIS project is to facilitate the development and design of innovative aircraft and engine structures through an integrated ecosystem of simulations and digital tools. This approach enables a synergistic connection between design, production engineering, and monitoring technologies. This project analyzes the production of an Outlet Guide Vane (OGV), a static component of an aero-engine that integrates a composite center section and titanium inserts at the ends. A detailed study of the titanium-composite bond was conducted, employing different surface treatments applied to Grade V titanium. Chemical, mechanical, and advanced technology treatments were included, with the aim of improving adhesion between the two materials. A thorough characterization of the treated surface was performed using optical analysis techniques, focusing on the study of morphology, roughness, and surface free energy. Finally, a rapid adhesion test was performed to quantify the influence of these treatments on the compatibility of titanium with the two-component RTM6 epoxy resin used in the project for the manufacture of the final demonstrator. Future work includes the manufacture of titanium-composite panels using the different surface treatments analyzed in this work using the Resin Transfer Molding (RTM) technique. The objective is to carry out a mechanical evaluation to determine the influence of the surface treatment on the titanium's mechanical properties.

  Abstract
  One of the main objectives of the CAELESTIS project is to facilitate the development and design of innovative aircraft and engine structures through an integrated ecosystem [...]

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• Process monitoring of aeronautical-graded materials using fiber optics sensors during liquid resin infusion: study on scalability methods

  C. Builes, M. Román Rodríguez, T. González, A. Núñez, R. Lombera

  Materiales Compuestos (2025). Vol. 09 - Comunicaciones MatComp25 (2025), (Núm. 1 - Fabricación y Aplicaciones Industriales), 41

  
  

  Abstract

  The main objective of the FLASH-COMP project is to develop an advanced and efficient quality control solution, operator oriented, capable of detecting defects early and accurately during the manufacturing process. This facilitates the implementation of in-situ corrective actions, aiming to achieve a zero-defect Liquid Resin Infusion (LRI) manufacturing process while significantly, reducing waste generation in composite material production. FLASH-COMP seeks to introduce new diagnostic methods that enable real-time process monitoring, providing relevant information during the process without compromising performance or the quality of the final component. Two embedded fiber optic sensor technologies are used: Fiber Bragg Grating (FBG) and Distributed All Grating (AGF), which are combined to collect process data during the preforming and resin infusion stages. Both technologies are integrated into a complex-geometry component to monitor different critical areas simultaneously. These technologies generate valuable process data, requiring an optimal strategy of sensor positioning, that can adapt to abrupt geometric changes without compromising sensor integrity or component quality. Both sensor technologies provide relevant information related to vacuum level and leaks, temperature, resin impregnation and part curing. This type of sensor requires prior training of the operator for its correct handling and analysis of the data generated. New strategies for manipulating sensors are proposed to facilitate their manipulation on an industrial scale.

  Abstract
  The main objective of the FLASH-COMP project is to develop an advanced and efficient quality control solution, operator oriented, capable of detecting defects early and accurately [...]

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