The paper considers sandwich panels, which consist of two thin facings and a shear-deformable core. Such elements are commonly used are commonly used in civil engineering, but also in the space, aviation and automotive industries. One of the basic problems of such structures is the issue of thin facing instability. The case of a panel with a deep-profiled facing is considered. The facing is stabilized by the panel core, but also, thanks to deep profiling, it is stabilized at the place of its bends. Despite such stabilization, at specific compressive stresses of the facing (resulting from mechanical loads or thermal effects), the facing wrinkles. This paper presents the influence of the width of the facing band and its support conditions on the value of stresses wrinkling the facing. A theoretical energy approach will be used to solve the problem, and appropriate numerical simulations will be carried out. The obtained results will allow determining the influence of model parameters on the value of stress causing instability of the facing.

Acknowledgement: The scientific activity of the Institute of Mathematics, Poznan University of Technology was funded under grant no. 0213/SBAD/0122.