Real-time Crack Monitoring in Lattice Sandwich Structures Using High-Resolution Imaging

Sandwich structures with composite skins and 3D-printed titanium lattice cores are gaining prominence in aerospace and other industries due to their exceptional strength-to-weight ratio and mechanical performance. However, they are prone to crack propagation, posing a significant risk of catastrophic failure. This study focuses on employing high-resolution camera monitoring to track crack initiation and growth in these structures. Short beam bending tests were conducted on sandwich specimens, applying loads within the laminate plane. A high-resolution camera was positioned to capture real-time images during the tests. The captured data were correlated with the load-displacement curve to analyse crack propagation patterns. The findings demonstrate the effectiveness of high-resolution camera monitoring in detecting and tracking crack propagation in composite-skinned sandwich structures, even amidst background noise. This methodology offers a valuable tool for developing advanced inspection and maintenance strategies to ensure the structural integrity of these critical components.