2 State of the art
2.1 Sandwich structures
Sandwich structures are based on the principle of separating two thin and stiff faces by
a thick, mechanically weak lightweight core. Load transfer between these three components is achieved by adhesive bonding (Figure 2). This arrangement functions like an Ibeam, where as much material as possible is placed farthest away from the neutral axis,
thus providing excellent weight specific bending stiffness and strength. The core primarily serves the function to transmit transverse shear and to prevent the thin faces from
buckling, while the faces are mainly under normal stresses. Sandwich structures can be
tailored for a great variety of applications. In particular, the core can fulfill additional
functions, such as noise or thermal insulation. In the following, the main aspects of sandwich construction with focus on aircraft interior applications are introduced.
2.1.1 Face sheets
A great variety of materials can be used as sandwich face, as long as it is available as thin
sheet. Therefore, designers have the freedom to select a suitable material based on the
© Springer-Verlag GmbH Germany, part of Springer Nature 2020
R. Seemann, A Virtual Testing Approach for Honeycomb Sandwich Panel
Joints in Aircraft Interior, Produktentwicklung und Konstruktionstechnik 16,
https://doi.org/10.1007/978-3-662-60276-8_2
Figure 2 Sandwich construction
2.1 Sandwich structures
Sandwich structures are based on the principle of separating two thin and stiff faces by
a thick, mechanically weak lightweight core. Load transfer between these three components is achieved by adhesive bonding (Figure 2). This arrangement functions like an Ibeam, where as much material as possible is placed farthest away from the neutral axis,
thus providing excellent weight specific bending stiffness and strength. The core primarily serves the function to transmit transverse shear and to prevent the thin faces from
buckling, while the faces are mainly under normal stresses. Sandwich structures can be
tailored for a great variety of applications. In particular, the core can fulfill additional
functions, such as noise or thermal insulation. In the following, the main aspects of sandwich construction with focus on aircraft interior applications are introduced.
2.1.1 Face sheets
A great variety of materials can be used as sandwich face, as long as it is available as thin
sheet. Therefore, designers have the freedom to select a suitable material based on the
© Springer-Verlag GmbH Germany, part of Springer Nature 2020
R. Seemann, A Virtual Testing Approach for Honeycomb Sandwich Panel
Joints in Aircraft Interior, Produktentwicklung und Konstruktionstechnik 16,
https://doi.org/10.1007/978-3-662-60276-8_2
Figure 2 Sandwich construction