Improved design and damage tolerance of lightweight composite sandwich structures

A sandwich panel—two stiff skins bonded to a lightweight core—can now be designed to resist cracking and delamination under load, not just to be stiff and light. This matters because lightweight composite sandwich structures are used in aircraft wings, wind turbine blades, and electric vehicle bodies, where saving weight cuts fuel or battery use. But these structures are vulnerable to hidden internal damage from impacts or repeated loading, which can grow without visible warning and lead to catastrophic failure. Current design methods lack reliable ways to predict how damage initiates and spreads through the complex layered geometry. If this project succeeds, engineers will have a multi-scale computer model that predicts load response and progressive failure in carbon-fibre sandwich panels, validated by high-resolution imaging experiments. That would allow designers to build in damage tolerance from the start—placing reinforcement exactly where it is needed—rather than over-engineering to compensate for unknowns. The result could be lighter, safer, and more durable structures for aerospace, marine, and renewable energy applications, directly supporting Net-Zero goals by reducing material use and extending service life.