ABSTRACT
Key to the performance of any sandwich structure are the properties provided by the face sheet or “skin” materials. This chapter details most of the materials such as metals, plastics, wood, and composites that are typically used for face sheets including specific alloys or chemistries and the mechanical and physical properties that make them advantageous for use. Isotropic materials are detailed first, including relatively dense materials with high modulus and strength such as various grades of steel, aluminum, titanium, and other metals used primarily in the aerospace industry. Plastic materials are detailed next and generally focus on nonreinforced thermoplastic materials and the various grades available for use as semi-structural face sheet materials with low density and good durability. Orthotropic materials are then discussed, starting with wood and wood derivatives, and culminating with a detailing discussion on polymer matrix composites (PMCs). The large variety of thin laminate constructions available to the designer and the widespread use of PMCs as face sheets in multiple industries validate the lengthy focus on these styles of materials.
