Joining mechanisms Rivets

The mechanical joining of aluminium alloys to steels using rivets and bolts, a combination which is difficult to avoid in the shipbuilding industry, represents a typical example of a situation where subsequent bimetallic corrosion could occur. Similarly, other examples of an ill-conceived choice of materials, which could normally be avoided, can be found in, for... 

Finally, mechanical joints, e.g. nuts, bolts, rivets etc., are still important joining methods for which attention must be given to compatibility to avoid dissimilar metal corrosion problems and crevice corrosion " . ... 

Modern technology involves new types of materials that cannot be joined by means of traditional mechanical methods such as welds, rivets, screws, and bolts. These materials include different types of ceramics, glass ceramics, alloys, composites, etc. 

Combining is a process of joining two or more materials together. Using mechanical fasteners such as nails, staples, screws, bolts, and rivets is a common method of combining materials. One advantage of mechanical fasteners is that they can join together different types of materials. Mechanical fasteners also allow for easy assembly and disassembly of a prototype. 

Fastener connection—A mechanical joint held together by fasteners that are additional to the components being joined. The fastener may be used directly in the transfer of load between the components to be joined (e.g. as in a bolted, riveted or screwed connection) or indirectly (e.g. as in a friction gripped, clamped or strapped connection). 

A large variety of mechanical fasteners can be used for joining plastic parts to themselves and to other materials. These include machine screws, self-tapping screws, rivets, spring clips, and nuts. In general, when repeated disassembly of the product is anticipated, mechanical fasteners are used. 

Composites are mechanically fastened in a manner similar to metals. Parts are drilled, countersunk, and joined with a fastener. Rivets, pins, two-piece bolts, and blind fasteners made of titanium, stainless steel, and aluminum are all used for composites. Several factors should be considered ... 

Because of the lower ductility of the fluorocarhon materials (e.g., TFE, CTFE, FEP), snap-fit and press-fit joints are seldom nsed. Rivets or studs can be used in forming permanent mechanical joints. These can be provided with thermal techniques on the melt-processable grades. Self-tapping screws and threaded inserts are used for many mechanical joining operations. In holted connections, some stress relaxation may occur the first day after installation. In such cases, mechanical fasteners should he tightened thereafter, stress relaxation is negligible. 

Joining Vj6i-nig (14c) n. The process of assembhng plastic parts by means of mechanical fastening devices such as rivets, screws, clamps, etc. 

By definition, a structural bond involves the formation of a load-bearing joint between high-strength materials, typically metal, wood, ceramic, and certain plastics. The first step in the selection of a joining method should be a comparison of the relative merits of the available techniques.In addition to structural adhesives, these include a number of mechanical fastening methods, such as screws, bolts, nails, staples, and rivets, as well as metal fusion processes. Many of these techniques are usually associated with the joining of metal structures. 

Most structures require the joining of one or more similar or dissimilar materials in their fabrication. Conventional joining techniques have employed mechanical fasteners, such as screws, nails, bolts, and rivets. These joining techniques result in large stresses near the fastener, produced by nonuniform load distributions. 

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