Composite repair and remanufacturing

von Freeden, Justus and de Wit, Jesper and Caba, Stefan and Kroll, Susanne and Zhao, Huan and Ren, Jinchang and Yan, Yijun and Arshed, Farhan and Ahmad, Abdul and Xirouchakis, Paul; Colledani, Marcello and Turri, Stefano, eds. (2023) Composite repair and remanufacturing. In: Systemic Circular Economy Solutions for Fiber Reinforced Composites. Springer International Publishing AG, Cham, Switzerland, pp. 191-214. ISBN 9783031223525 (

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For the reuse of components and structures made of fiber composite materials, a complete remanufacturing process chain is necessary to prepare the parts for a further life cycle. The first step is to dismantle the parts to be reused. Fiber composite components are mostly joined using adhesive technology, so that solution techniques are required for adhesive connections. One possibility is the separation of the adhesive layer by means of thermally expanding particles. Adhesive residues are removed by laser so that the components can be glued again after reprocessing. The decisive factor for which process is used for the remanufacturing of the components is the state at the end of the life cycle. Non-destructive testing methods offer a very good option for detecting damage, planning necessary repairs and direct reuse of damage-free components. Repairs to fiber composite structures have been carried out in aviation for a long time and are accordingly established. These processes can be transferred to the repair of automotive fiber composite components. Many technical solutions were developed and tested as part of the project. Future research work is aimed at further development, particularly with regard to the automation of the technologies in order to enable an industrial application of the recycling of automobile components made of fiber composites.