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short-fiber reinforced polymers

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780276
EISBN: 978-1-62708-281-5
...Abstract Abstract This article briefly reviews abrasive and adhesive wear failure of reinforced polymers and polymer composites, namely particulate-filled polymers, short-fiber-reinforced polymers, polymers with continuous fibers, and mixed reinforcements and fabrics. It includes scanning...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870285
EISBN: 978-1-62708-314-0
... Reaction injection molding (RIM) (no reinforcement) Fig. 10.18 Reinforced reaction injection molding (RRIM) (short-fiber reinforcement) Fig. 10.19 Structural reaction injection molding (SRIM) (long-fiber reinforcement) Fig. 10.20 Injection molding machine sequence. Source...
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
... in a woven fabric, or randomly oriented ( Fig. 10.1 ). The fibers may be very long or chopped into short segments for easy fabrication. In thick sections, it is possible to have three-dimensional composites with randomly oriented short fibers. Fiber reinforcement is used to impart stiffness (increased...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.9781627083492
EISBN: 978-1-62708-349-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860095
EISBN: 978-1-62708-338-6
... of Plastics ASTM D 1599-99(2005) Standard Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings ASTM D 2105-01(2007)e1 Standard Test Method for Longitudinal Tensile Properties of “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Tube ASTM...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030001
EISBN: 978-1-62708-349-2
... are applicable to short, discontinuous fiber composites and thermoplastic-matrix materials. ...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870573
EISBN: 978-1-62708-314-0
... than the fiber diameter will facilitate thorough impregnation, thereby reducing porosity. Wetting agents can also be used to help infiltration into the fiber tows or preform. Short fibers or whiskers are often mixed with a ceramic powder slurry, dried, and hot pressed. Short fibers and whiskers...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030237
EISBN: 978-1-62708-349-2
... not be visible to the naked eye, cross sectioning a composite and viewing with transmitted light may reveal even slight oxidation. Figure 14.3 shows a micrograph of an ultrathin section that was developed to determine the effect of short-term UV exposure on a carbon-fiber-reinforced composite part. It can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550385
EISBN: 978-1-62708-307-2
... or short fiber forms are also used, because the inherent toughness and fibrillar nature of aramid allows the creation of fiber forms not readily available with other fibers. As a result of their high tensile strengths and superior damage tolerance, aramid composites are often used for lightweight...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780064
EISBN: 978-1-62708-281-5
... Auto interior panels Tub/shower shells, which are later fiber reinforced Pickup truck bed liners Internally lighted acrylic and cellulose acetate butyrate (CAB) signs The thermoforming process offers some unique tooling advantages over other conventional plastic processes, primarily...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780003
EISBN: 978-1-62708-281-5
... or thermal collapse, dielectric strength is improved by increasing the basic mechanical strength of the polymer (such as by adding fiber reinforcements to PTFE) and/or by increasing its thermal dimensional stability. In most cases, polymers make poor electrical conductors. This is because the primary...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550325
EISBN: 978-1-62708-307-2
... and thermoset resins. It also includes continuous fiber-reinforced resins (composite materials) as well as the short fiber- and/or particulate-reinforced plastics commonly used for parts and components. Because composites are a subset of engineering plastics, they are addressed in much greater detail...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870373
EISBN: 978-1-62708-314-0
... are molded using thermoplastics. Since the fibers are short and randomly oriented, the amount of strength and stiffness improvement is only nominal, as shown for the properties of E-glass/nylon in Table 14.2 . However, the improvement is substantial compared to the unreinforced polymer. Longer glass...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870001
EISBN: 978-1-62708-314-0
... its diameter. The length-to-diameter ( l / d ) ratio is known as the aspect ratio and can vary greatly. Continuous fibers have long aspect ratios, while discontinuous fibers have short aspect ratios. Continuous-fiber composites normally have a preferred orientation, while discontinuous fibers...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
... process than wet lay-up, but the mechanical properties are greatly reduced by the use of randomly oriented chopped fibers. Continuous glass roving is fed into a special gun that chops the fibers into short lengths and simultaneously mixes them with either a polyester or a vinyl ester resin...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030067
EISBN: 978-1-62708-349-2
... is sufficiently short that any stress raiser or abrasion may result in the fiber shattering ( Fig. 4.2 ). Given this, trying to cross section and polish boron fiber composites with conventional techniques can be frustrating as the boron particles break loose and gouge the polishing surface, frequently inflicting...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250077
EISBN: 978-1-62708-345-4
... to alter both long- and short-term mechanical properties of the basic material resin. Heat and wear resistance are also improved. Limitations of adding glass fibers include increased distortion during molding, increased wear of the mating gear material, and increased tool wear. Carbon fibers...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610377
EISBN: 978-1-62708-303-4
... fibers include glass, aramid, and carbon, which may be continuous or discontinuous. Both the type of reinforcement and the matrix affect processing. The two types of polymer matrices are thermosets and thermoplastics. A thermoset starts with a low-viscosity resin that reacts and cures during...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030089
EISBN: 978-1-62708-349-2
.... This is performed by subjecting the specimen to the final polishing step for a very short time—less than 30 seconds. This removes any excess laser dye that remained on the surface after the solvent-wiping process. There are many laser dyes that can be used to highlight the microcracks in fiber-reinforced...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870183
EISBN: 978-1-62708-314-0
... point for heating. Other forms of heating include hot gas torches, quartz lamps, and infrared (IR) heaters. The mere fact that autoconsolidation is possible illustrates that the contact times for many thermoplastic polymers at normal processing temperatures can be quite short. Provided that full contact...