Sandwich panels have become an indispensable part of modern lightweight construction. They combine high strength with low weight and enable designs that are often impossible to achieve with traditional materials. But what exactly is the principle behind them—and why are sandwich panels the better solution in so many fields?
The name “sandwich panel” already describes its structure: It consists of three main components:
two sturdy outer layers (e.g., aluminum or fiberglass-reinforced plastic)
a lightweight core material (e.g., foam or honeycomb core)
The outer layers absorb external forces, while the core provides spacing and absorbs shear forces. The key point here is that the combination of these materials produces properties that no single material can achieve on its own.
The operating principle is based on a simple physical effect. The spacing between the outer layers results in high flexural stiffness—while using minimal material. The upper layer facing absorbs compressive forces, the lower layer facing absorbs tensile forces, and the core stabilizes and bonds the two layers together. This results in high stability with minimal weight.
