Integrated framework for manufacturing, design and monitoring of composite bonded joints
The use of polymeric composites reinforced with fibers in the transport sector is strongly growing, as an alternative to metals for the design of lightweight structures. The structural applications of composite materials often require the assembly of different parts, and bonding represents an excellent solution, allowing for lightweight and economical connections. However, purely bonded structural joints are not always feasible, due to the inability to guarantee the absence of defects caused by surface contamination and thus predict performance in service. This necessitates the use of heavier and more expensive hybrid bonded/bolted joints, while the industry would prefer to adopt purely bonded connections with greater reliability.
The IDEA project has addressed this need by developing industrial-scale methodologies to increase the safety and reliability of bonded joints in composites, acting on three levels. First, innovative surface treatments have been studied to increase the strength of the joints and ensure the absence of contaminants. Then, an efficient tool for the safe and optimized design of bonded joints has been developed, compatible with industrial workflows. Finally, structural monitoring solutions in service have been tested, allowing for real-time assessment of the condition of the most critical joints. Industries can benefit from the results of this project, significantly improving the reliability of bonded connections in lightweight structures.
