By Robert W. Messler
Becoming a member of of fabrics and constructions is the 1st and purely entire and hugely readable therapy of the choices for becoming a member of traditional fabrics and the buildings they include in traditional and unconventional methods, and for becoming a member of rising fabrics and buildings in novel methods. becoming a member of through mechanical fasteners, indispensable designed-or formed-in beneficial properties, adhesives, welding, brazing, soldering, thermal spraying, and hybrid procedures are addressed as procedures and applied sciences, as are concerns linked to the becoming a member of of metals, ceramics (including cement and urban) glass, plastics, and composites (including wood), in addition to, for the 1st time at any place, dwelling tissue. whereas curious about fabrics matters, concerns regarding joint layout, construction processing, caliber insurance, strategy economics, and joint functionality in carrier should not neglected. The publication is written for engineers, from an in-training scholar to a professional practitioner by way of an engineer who selected to educate after years of perform. by way of interpreting and concerning this publication, the options to becoming a member of difficulties might be inside one's take hold of. Key positive factors: ?·
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Additional resources for Joining of materials and structures: from pragmatic process to enabling technology
8 shows a bridge that obviously had to be erected on site using prefabricated detailed parts. Cost is often a key consideration, even if not the driver, for a manufactured product or structure. , maximizing structural efficiency); (4) achieving functionality through large size and/or complex shape (without pressing primary processing limits); and (5) sometimes (depending on the process) allowing automated assembly (to reduce labor cost and improve product consistency). 9 shows how joining can be automated, thereby lowering the cost of a product’s manufacture.
25" diam. 1 A schematic illustration of a fastened versus adhesively bonded single-overlap joint. Sections at A and C pass through the joint elements with their full cross-sectional area. Section B passes through the overlap area where, if fasteners requiring holes are needed, the cross-sectional area is reduced by the total area occupied by the holes. (Reprinted from Joining of Advanced Materials, Robert W. , ButterworthHeinemann, Stoneham, MA, 1993, Fig. 7 Some Key Concepts Relating to Joints 37 The actual stress (in shear) in the rivets and, alternatively, in the adhesive are: trivets ¼ 1, 800 lbs:=(2)(p)[(0:250 in:)=2]2 ¼ 18, 355 psi and tadhesive ¼ 1, 800 lbs:=(1:5 in:)(3:0 in:) ¼ 400 psi: The much lower stress carried in shear in the adhesive joint than in the structural elements carried in tension is due to the much greater area of the adhesive bond than of the element’s cross-section.
If a functional design cannot be manufactured at any cost, it will never have a chance to function. Joining plays a key role in achieving manufacturability in several ways. First and foremost is the use of joining to achieve structural efficiency, which clearly relates closely to functionality. ) at minimum structural weight. 4 Joining allows the use of fundamentally dissimilar materials to achieve special function. Here a glass windshield consisting of glass mounted in a metal frame and sealed with a polymer is being robotically assembled into a modern automobile constructed of metal, plastic, or reinforced plastic.
Joining of materials and structures: from pragmatic process to enabling technology by Robert W. Messler