Bonded Structures

Bonded Structures

 

structures that consist of elements formed by adhesive bonding and joined by bonded joints or joints of other types. There are architectural, marine (bodies of motor-boats, rowboats, and other vessels), and aviation (helicopter fuselages and certain other types of aircraft) bonded structures. Modern synthetic adhesives make possible the joining of materials of different types (for example, wood or concrete and metal) used in bonded structures.

The most widespread bonded structure is the architectural type, which includes supporting and exterior structures. Supporting bonded structures, which are usually made of wood or plywood, have a variety of shapes, such as beams, frames, arches, and girders. Exterior bonded structures, which combine the functions of supporting and insulating wall elements and roofing, are usually in the form of sandwich panels with exterior sheathing made from a strong sheet material bonded to internal ribs or to an intermediate layer of a low-density material. Among the materials used as sheathing are aluminum, plywood, asbestos cement, and glass-fiber-reinforced plastics based on synthetic binders (phenol, polyester, and epoxy resins). The intermediate layer may be continuous, made of foam plastic (polystyrene, phenol, polyurethane, or polyvinyl chloride), or cellular (usually hexagonal), made from cardboard or from paper impregnated with a synthetic resin. Other varieties of bonded structures consist of synthetic fabrics based on adhesive compounds, which are used as coverings for temporary structures (for example, grain storehouses) or as shelters during construction work.

Further improvement of bonded structures depends on increased strength and improved heat resistance and durability in various climates, particularly in the Far North, where supporting and exterior bonded structures are very effective because of their low weight, increased rigidity, and transportability.

IU. M. IVANOV

References in periodicals archive ?
Solvay developed FusePly to enable the build of reliable, bonded composite parts using conventional manufacturing processes, through the creation of covalently bonded structures thus potentially removing the need for abundant rivets and fasteners.
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Fibers possessed bonded structures and the average fiber diameter was in the range of 5-6 [micro]m when fabricated in polar aprotic solvents, such as MEK and THF.
The improvement of mechanical properties of PS/PBA fibrous mats originated from the formation of bonded structures between fibers, which is achieved through the addition of PBA.
The electrospun PS fibers did not possess a bonded structure between fibers, only physical attachments were observed.
Interestingly, the elements of group 16 and 17 are known to form relatively stable multiply bonded structures, even without large bulky groups as stabilizers, such as S = S[F.sub.2], which has a bond order of greater than 2.
Keele's science park will benefit by pounds 43,000 to develop ultra-sound equipment to test adhesively bonded structures in the automotive industry.
The fabric hand is substantially improved when compared to that of most spunbondeds, wet laids and latex bonded structures. Powder bonded nonwovens can also withstand multiple cycles of home washing and drying, as well as dry cleaning.