Multifunctional Failure Analyses and Mechano‐Electromagnetic Repairing of Woven Lattice Sandwich Composite Structures

ABSTRACT Radome composites demand high radar transmissivity paired with stable mechanical properties across varying ambient temperatures. Building upon previous studies on the room‐temperature quasi‐static mechanical recovery of woven lattice sandwich composites (WLSCs), this study extends the investigation to the restoration of mechano‐electromagnetic performance under diverse thermal and loading conditions. An integrated mechano‐electromagnetic repair method is proposed and evaluated. The study comprehensively investigates the temperature‐dependent mechanical behaviors and microwave transmission characteristics of the structures before and after repair. Quantitative results demonstrate exceptional recovery efficacy: the load‐bearing capacity of repaired double‐layer structures reaches 250.2% of the pristine level under bending loads, and the impact resistance is restored to 166.8%. Furthermore, the electromagnetic transmission efficiency is fully recovered to 100.3% on average, with performance in the X‐ and Ku‐bands surpassing pre‐repair levels. The experimental findings conclusively validate that the proposed repair scheme not only effectively restores the mechanical integrity of WLSC panels under varying temperatures and loading modes but also fully recovers the mechano‐electromagnetic functionality of the WLSC radome.