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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870031
EISBN: 978-1-62708-314-0
... Abstract This chapter discusses the properties and processing characteristics of glass, aramid, carbon, and ultra-high molecular weight polyethylene fibers and related product forms, including woven fabrics, prepreg, and reinforced mats. It also includes a review of fiber terminology as well as...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860035
EISBN: 978-1-62708-338-6
... programming various geometries using advanced software tools and discusses how various materials, such as rovings, tow-preg, prepreg tape, and woven materials, affect winding program generation. computer numerical controlled winding machines computer-aided manufacturing filament winding prepreg tape...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870119
EISBN: 978-1-62708-314-0
... ,” 33rd International SAMPE Technical Conf. , November 2001 11. Dow M.B. and Dexter H.B. , “ Development of Stitched, Braided and Woven Composite Structures in the ACT Program and at Langley Research Center (1985 to 1997), Summary and Bibliography ,” NASA/TP-97-206234 , November...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870183
EISBN: 978-1-62708-314-0
... can be successfully consolidated in very short times (minutes if not seconds), while woven powder coated or comingled prepregs require longer times for the resin to flow and impregnate the fibers. Occasionally, a process called film stacking is used, in which alternating layers of thermoplastic film...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860115
EISBN: 978-1-62708-338-6
... angles up to 4° and higher with the appropriate fiber/resin combination that allows large geodesic path deviations. Structural attachments or skirts are typically hand or machine lay-up (fiber placement) of axial (longitudinal) and ±45° to axis reinforcements (unidirectional or woven) coupled with...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290009
EISBN: 978-1-62708-319-5
... distribution toward the larger sizes. The historical approach to particle size analysis arose using woven wire mesh screens. Sieve analysis involves passing a powder through screens with grids of progressively smaller-spaced wires. Mesh size is determined by the number of wires per unit length; opening...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870255
EISBN: 978-1-62708-314-0
... prepreg, are laid up on separate facility tools and hot debulked. Hot debulking is used to consolidate the lay-up to near-net thickness to aid in tool location. At the same time, the rib plies, made from woven prepreg, are laid up on their individual form blocks and hot debulked. Film adhesive sheet is...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860095
EISBN: 978-1-62708-338-6
...-wound structure can be confidently designed. There are data for aircraft designers, B-basis allowables, that are provided for unidirectional or woven prepreg laminates which are hand or automatically laid up and cured and compacted in an autoclave, but these data are not generally available for the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550385
EISBN: 978-1-62708-307-2
.... Continuous fiber composites normally have a preferred orientation, while discontinuous fibers generally have a random orientation. Examples of continuous reinforcements ( Fig. 8.2 ) include unidirectional, woven cloth, and helical winding, while the discontinuous reinforcements shown are chopped fibers and...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240583
EISBN: 978-1-62708-251-8
... approximately 1650 °C (3000 °F). In a vacuum, uncoated molybdenum has a virtually unlimited life at high temperature. Unalloyed tungsten mill products are PM products that are strongly dependent on deformation history, purity, and testing orientation. Wire made of unalloyed tungsten can be woven into a mesh...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870285
EISBN: 978-1-62708-314-0
... gel coat onto the tool surface prior to spray-up. Woven roving or cloth is occasionally added to the laminate to provide higher strengths in certain locations, and core materials are easily incorporated. General-purpose, room-temperaturecuring or low-temperature-curing polyesters are used with single...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
... example, prepreg cloth is more expensive than dry woven cloth. While complex dry preforms may be expensive, using them can lower fabrication costs overall by reducing or eliminating hand lay-up costs. If structural efficiency and weight are important design parameters, continuous-reinforced product forms...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730115
EISBN: 978-1-62708-283-9
... stronger and stiffer than the matrix material. Different geometric arrangements of the fibers are possible. The fibers may be unidirectionally aligned, aligned at 90° to one another in a woven fabric, or randomly oriented ( Fig. 10.1 ). The fibers may be very long or chopped into short segments for easy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860001
EISBN: 978-1-62708-338-6
... speed ( Ref 1.17 – 1.19 ). The filament-winding process is a low-cost method of manufacturing composite preforms, which have a high fiber volume with a virtually unlimited number of repeatable and accurate fiber angles. As an alternate to woven fabric and braiding, Storage Tek Composites (Louisville...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550569
EISBN: 978-1-62708-307-2
... (NASA) and the locations of the turbopump and blisk. The blisks were produced by CVI of a woven preform, which was subsequently machined and thermally treated to complete densification. The final turbopump assembly is shown in Fig. 11.17 . Exhaust nozzle flaps and seals . Ceramic-matrix composites...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870373
EISBN: 978-1-62708-314-0
... continuous fiber woven roving, as shown in Table 14.6 . In this table, CSM properties are compared with those of roving woven combi, which is a combination of CSM and woven cloth; a biaxial 0°/90° woven cloth; and a unidirectional woven cloth that has a high percentage of reinforcement in the zero-degree...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870573
EISBN: 978-1-62708-314-0
..., which can be prepregged with the ceramic matrix precursor material or held together with a fugitive binder. The sheets are then cut from the drum and layed up in the desired orientation. For fabric constructions, the tows are usually woven prior to applying the interfacial coatings to minimize damage to...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870235
EISBN: 978-1-62708-314-0
... method that has gained wide acceptance is the use of a peel ply. In this technique, a closely woven nylon or polyester cloth is used as the outer layer of the composite during lay-up; this ply is torn or peeled away just before bonding or painting. The theory is that the tearing or peeling process...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870401
EISBN: 978-1-62708-314-0
... can be applied to the exterior surfaces of composites to prevent electric field penetration and puncturing and to conduct lightning currents. Protective materials include arc or flame-sprayed metals, woven wire fabrics, expanded metal foils, aluminized fiberglass, nickel-plated aramid fiber, and metal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540319
EISBN: 978-1-62708-309-6
... fibers of glass, carbon, boron, aramid, or ceramic. The preforms may be a unidirectional prepreg tape or a multidirectional fabric (e.g., woven, weaved, braided, or knitted). In general, prepreg tapes made of thermoplastic resins have much longer shelf lives. The fiber-reinforced composite laminates also...