<p>This paper presents a theoretical analysis, numerical simulation, and experimental validation of the buckling of ribs during the roll-bending process of 2A12 aluminum alloy integral mesh panels with fillers. First, the integral mesh panels and fillers were modeled as isotropic composite plates. A bending moment calculation model for the roll-bending process was established, and a formula for the critical buckling load of the ribs was derived using the energy method. Subsequently, the reliability of the equivalent model was verified through finite element simulation. The buckling behavior of ribs near the critical buckling load under different dimensional parameters was analyzed, and the effects of rib geometric parameters, friction coefficient, and roll-bending speed on buckling characteristics were investigated. The results indicate that the critical buckling load of the rib decreases with increasing rib height and slenderness ratio, while it increases with increasing thickness; also, the friction coefficient and forming speed have significantly different effects on ribs at different locations. The experimental results show good overall agreement with the theoretical analysis and simulation predictions, with an error in the maximum rib offset of less than 0.1&#xa0;mm, confirming the high reliability of the model.</p>