The composite hangars can be customised according to the client's requirements and are quick and easy to install.
The composite hangars can be customised according to the client's requirements and are quick and easy to install.

Hexcel reports that its HiMax glass fiber fabrics were selected by Greek company Dasyc SA to make its Composite Modular Transportable Hangar (CMTH). Made from prefabricated composite sandwich panels, the structure can be employed in a wide variety of civil or military applications. The use of Hexcel quadaxial reinforcements enabled Dasyc to make a composite structure with a strength equivalent to that of a concrete or steel building, Hexcel says.

Dasyc developed the composite hangar to address needs for mobile storage, parking and housing structures. The design enables transportation, assembly and disassembly in any location. Possible applications for the structures range from housing aircraft, helicopters and military vehicles, to the storage of equipment at construction sites or airports.

To create the CMTH hangar the composite panels are assembled together to form arches. The length of the hangar is dependent on the number of arches used. The panels are manufactured at Dasyc’s production plant in Markopoulo using a vacuum assisted resin transfer moulding (VARTM) process. They are 80 mm thick sandwich structures consisting of a hard polyurethane core material between two laminate skins of glass fiber reinforced polyester resin.

Structural loads

For this project Dasyc required reinforcements that would form a composite structure with a strength similar to that of a concrete or steel building and capable of withstanding the same structural loads as specified by the Eurocodes building regulations. To provide the required mechanical properties Hexcel Reinforcements UK supplied its HiMax FGE112 1200 g/m2 quadaxial fabric, consisting of four layers of E-glass fibers aligned in the 0°/-45°/90°/+45° orientations and stitched together with polyester thread. Four layers of FGE112 were used in each skin. In addition to imparting structural support and stiffness to the laminate, quadaxial fabric can reduce labor in the lay-up process as it is possible to apply multiple layers simultaneously. The isotropic properties exhibited by the quadaxial fabric also helped the development and analysis process for the hangar structure since it was easier to apply the standard building codes and gain customer acceptance.

Hexcel supplied approximately 40 tonnes of glass fiber reinforcements for each of the hangars delivered to the Hellenic Air Force. The majority of material was FGE112, with a smaller amount of 450 g/m2 continuous filament mat also being provided to aid resin flow during the infusion process.

This story is reprinted from material from Hexcel, with editorial changes made by Materials Today. The views expressed in this article do not necessarily represent those of Elsevier.