Kilian Demilly improves the durability of composite materials at IRDL

Kilian Demilly, a researcher at the National Polytechnic Institute of Brittany, has unlocked a scientific barrier regarding the impact of initial damage on the fatigue of composite materials. His thesis, defended in 2025, proposes advanced testing protocols to assess the residual lifespan of these materials, thereby ensuring their reliability in critical applications in Benin and beyond.

Research on laminated composite materials is essential in sectors such as aerospace and automotive. Although these materials are prized for their lightness and strength, they can suffer degradations compromising their performance. Kilian Demilly studied the influence of initial damage on the fatigue properties of unidirectional laminated composites, a major issue for ensuring their durability.

By integrating self-heating measurements, Demilly assessed the residual lifespan of composites. This approach allows for a better understanding of how even minor imperfections can lead to catastrophic failures. The results show that the impact of an initial shock or cracking is decisive for the durability of materials, thus reinforcing the need for rigorous testing protocols.

The implications of this research are significant for decision-makers and industry players. By adopting advanced testing protocols, companies can improve the durability of their products, thus providing a competitive advantage in the composite materials market. It is crucial to act quickly to integrate these innovations before the market becomes saturated.

« « My study demonstrates that even small imperfections in composite materials can have a major impact on their durability, highlighting the importance of rigorous testing, » says Kilian Demilly. »

« « Access to research like that of Kilian Demilly is fundamental for decision-makers looking to improve the safety and reliability of composite materials in critical applications, » emphasizes the Lektaris team. »