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Stiffening is any process that increases the rigidity and structural integrity of objects. Stiffening is used in crafts, art, industry, architecture, sports, aerospace, object construction, bookbinding, etc.
In mechanics, "stiffening" beams brings anti-buckling, anti-wrinkling, desired shaping, reinforcement, repair, strength, enhanced function, extended utility. longer beam life, safety, etc. Stiffening of fluid or rigid beams is used in medical arts, aerospace, aviation, sports, bookbinding, art, architecture, natural plants and trees, construction industry, bridge building, [1] and more. Mechanical methods for stiffening include tension stiffening, [2] centrifugal stiffening, [3] bracing, superstructure bracing, substructure bracing, straightening, strain stiffening, stress stiffening, [4] damping vibrations, swelling, pressure increasing, drying, cooling, interior reinforcing, exterior reinforcing, wrapping, surface treating, or combinations of these and other methods. Beams under bending loads or compression invite stiffening to stop buckling or collapse while fulfilling desired functions, purposes, and benefits.
In bookbinding, stiffening is a process whereby paperback books are reinforced for use in libraries, without change to their fundamental binding structure. It is in use at several academic libraries in the United States, including those at Cornell University and Johns Hopkins University.
During the stiffening process, a cloth or Tyvek strip is glued down on the inside joints of a paperback to reinforce the attachment of the book's covers. A thin but stiff board is then glued to the inside of both the front and back cover of the book, and the entire book is trimmed slightly on the head, tail, and fore edge, often with an electric guillotine.
Stiffening provides an in-house, inexpensive alternative to commercial library binding for paperbacks. While it does not involve (re-)sewing a book as in a library binding, stiffening does significantly prolong the usable life of a paperback, and allows paperbacks to stand upright on library shelves. The stiffening process was invented in 1974 by John Dean, who was Head of Preservation at Johns Hopkins at the time.
The codex was the historical ancestor of the modern book. Instead of being composed of sheets of paper, it used sheets of vellum, papyrus, or other materials. The term codex is often used for ancient manuscript books, with handwritten contents. A codex, much like the modern book, is bound by stacking the pages and securing one set of edges in a form analogous to modern bookbinding by a variety of methods over the centuries. Modern books are divided into paperback or softback and those bound with stiff boards, called hardbacks. Elaborate historical bindings are called treasure bindings. At least in the Western world, the main alternative to the paged codex format for a long document was the continuous scroll, which was the dominant form of document in the ancient world. Some codices are continuously folded like a concertina, in particular the Maya codices and Aztec codices, which are actually long sheets of paper or animal skin folded into pages.
Reinforced concrete (RC), also called reinforced cement concrete (RCC) and ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials. In corrosion engineering terms, when designed correctly, the alkalinity of the concrete protects the steel rebar from corrosion.
Buckram is a stiff cotton cloth with a loose weave, often muslin. The fabric is soaked in a sizing agent such as wheat starch paste, glue, or pyroxylin, then dried. When rewetted or warmed, it can be shaped to create durable firm fabric for book covers, hats, and elements of clothing.
Library binding can be divided into the two major categories of "original" and "after market". The original category is as it says: the book was originally bound with the idea that it would be used in a library setting where the book would receive harder use than those usual trade editions sold to the public.
Lamination is the technique/process of manufacturing a material in multiple layers, so that the composite material achieves improved strength, stability, sound insulation, appearance, or other properties from the use of the differing materials, such as plastic. A laminate is a permanently assembled object created using heat, pressure, welding, or adhesives. Various coating machines, machine presses and calendering equipment are used.
Bookworm is a general name for any insect that is said to bore through books.
In structural engineering, buckling is the sudden change in shape (deformation) of a structural component under load, such as the bowing of a column under compression or the wrinkling of a plate under shear. If a structure is subjected to a gradually increasing load, when the load reaches a critical level, a member may suddenly change shape and the structure and component is said to have buckled. Euler's critical load and Johnson's parabolic formula are used to determine the buckling stress in slender columns.
In structural engineering, a shear wall is a vertical element of a system that is designed to resist in-plane lateral forces, typically wind and seismic loads. In many jurisdictions, the International Building Code and International Residential Code govern the design of shear walls.
Strapping, also known as bundling and banding, is the process of applying a strap to an item to combine, stabilize, hold, reinforce, or fasten it. The strap may also be referred to as strapping. Strapping is most commonly used in the packaging industry.
The size of a book is generally measured by the height against the width of a leaf, or sometimes the height and width of its cover. A series of terms is commonly used by libraries and publishers for the general sizes of modern books, ranging from folio, to quarto (smaller) and octavo. Historically, these terms referred to the format of the book, a technical term used by printers and bibliographers to indicate the size of a leaf in terms of the size of the original sheet. For example, a quarto historically was a book printed on sheets of paper folded in half twice, with the first fold at right angles to the second, to produce 4 leaves, each leaf one fourth the size of the original sheet printed – note that a leaf refers to the single piece of paper, whereas a page is one side of a leaf. Because the actual format of many modern books cannot be determined from examination of the books, bibliographers may not use these terms in scholarly descriptions.
Specific modulus is a materials property consisting of the elastic modulus per mass density of a material. It is also known as the stiffness to weight ratio or specific stiffness. High specific modulus materials find wide application in aerospace applications where minimum structural weight is required. The dimensional analysis yields units of distance squared per time squared. The equation can be written as:
A book cover is any protective covering used to bind together the pages of a book. Beyond the familiar distinction between hardcovers and paperbacks, there are further alternatives and additions, such as dust jackets, ring-binding, and older forms such as the nineteenth-century "paper-boards" and the traditional types of hand-binding. The term "Bookcover" is often used for a book cover image in library management software. This article is concerned with modern mechanically produced covers.
A sandwich-structured composite is a special class of composite materials that is fabricated by attaching two thin but stiff skins to a lightweight but thick core. The core material is normally low strength material, but its higher thickness provides the sandwich composite with high bending stiffness with overall low density.
Bindery refers to a studio, workshop or factory where sheets of (usually) paper are fastened together to make books, but also where gold and other decorative elements are added to the exterior of books, where boxes or slipcases for books are made and where the restoration of books is carried out.
Glass fiber reinforced concrete (GFRC) is a type of fiber-reinforced concrete. The product is also known as glassfibre reinforced concrete or GRC in British English. Glass fiber concretes are mainly used in exterior building façade panels and as architectural precast concrete. Somewhat similar materials are fiber cement siding and cement boards.
John Ratcliff of the seventeenth century is the first identifiable bookbinder in America, known for binding Eliot's Indian Bible in 1663. Ratcliff, who came from London, England, worked as a bookbinder in Boston, Massachusetts, for about twenty years, from approximately 1662 to 1682.
Honeycomb structures are natural or man-made structures that have the geometry of a honeycomb to allow the minimization of the amount of used material to reach minimal weight and minimal material cost. The geometry of honeycomb structures can vary widely but the common feature of all such structures is an array of hollow cells formed between thin vertical walls. The cells are often columnar and hexagonal in shape. A honeycomb shaped structure provides a material with minimal density and relative high out-of-plane compression properties and out-of-plane shear properties.
A steel plate shear wall (SPSW) consists of steel infill plates bounded by boundary elements.
Bookbinding is the process of physically assembling a book of codex format from an ordered stack of paper sheets that are folded together into sections called signatures or sometimes left as a stack of individual sheets. Several signatures are then bound together along one edge with a thick needle and sturdy thread. Alternative methods of binding that are cheaper but less permanent include loose-leaf rings, individual screw posts or binding posts, twin loop spine coils, plastic spiral coils, and plastic spine combs. For protection, the bound stack is either wrapped in a flexible cover or attached to stiff boards. Finally, an attractive cover is adhered to the boards, including identifying information and decoration. Book artists or specialists in book decoration can also greatly enhance a book's content by creating book-like objects with artistic merit of exceptional quality.
Binder jet 3D printing, known variously as "Powder bed and inkjet" and "drop-on-powder" printing, is a rapid prototyping and additive manufacturing technology for making objects described by digital data such as a CAD file. Binder jetting is one of the seven categories of additive manufacturing processes according to ASTM and ISO.
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