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ply termination

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030137
EISBN: 978-1-62708-349-2
... performance. This chapter describes the optical microscopy and bright-field illumination techniques involved in analyzing ply terminations, prepreg plies, splices, and fiber orientation to provide the insight necessary for optimizing composite structure and performance. composites fiber orientation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860115
EISBN: 978-1-62708-338-6
...; design features such as skirt attachments and skirt-to-pressure-vessel structural Y-joints, flanges, and polar fittings; the definitions of hoop and helical wind angles; and what constitutes a ply and a layer for both hoop and helical windings. This nomenclature applies to all pressure vessels, including...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030089
EISBN: 978-1-62708-349-2
... facets that are usually investigated using reflected-light bright-field illumination. Shown in the cross section are voids (dark areas), ply terminations (i.e., ply drops), carbon fiber plies having different thicknesses, different prepreg material combinations (glass fabric prepreg and carbon fiber...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
... in the same direction. Exterior surface plies should be continuous. Minimizes warping and interlaminar shear. Develops strength of plies. Continuous surface plies minimize damage to edge of ply and help to prevent delamination. 16. Never terminate plies in fastener patterns. Reduces profiling...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030147
EISBN: 978-1-62708-349-2
... will be found in a composite and where the voids will most likely exist. It is common for composite parts to be designed with prepreg plies terminated at locations throughout the thickness of the lay-up. The junctures of these ply-drops contain areas where air may be trapped. Furthermore, at the edge of a ply...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870119
EISBN: 978-1-62708-314-0
... the preimpregnated ply as it is moved to the lay-up. Some manufacturers improve the quality and productivity by building their own impregnation machines. One simple example is shown in Fig. 5.2 , in which a dry reinforcement is being impregnated through rollers with a liquid resin. Fig. 5.1 Typical wet lay...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060183
EISBN: 978-1-62708-355-3
... of the properties of laminates. In actual practice, considerable success has been demonstrated in predicting laminate effective modulus or Poisson’s ratio from ply properties. However, prediction of laminate strength properties from lamina strength data has proved more difficult, and therefore it is often necessary...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030159
EISBN: 978-1-62708-349-2
.... The interlayer thickness and modulus, ply orientations, thickness of the ply layers, and the grouping of the plies affect the stress/strain levels at which microcracking occurs in fiber-rein-forced composites ( Ref 6 to 9 ). The residual stresses in a composite material act to preload the composite and can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870201
EISBN: 978-1-62708-314-0
... collation, and geometrical factors such as ply drop-offs, radii, and so forth. An obvious place where entrapped air pockets form is at the terminations of internal ply drop-offs. In addition, air can be entrained in the resin itself during the mixing and prepregging operations. It is been found through...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.9781627083386
EISBN: 978-1-62708-338-6
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
... in Bonded Composite Structures , 10th DOD/NASA/FAA Conference on Fibrous Composites in Structural Design , 1–4 Nov 1993 , Hilton Head Island, SC • Hart-Smith L.J. , Redmond G. , and Davis M.J. , The Curse of the Nylon Peel Ply , 41st SAMPE International Symposium...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030001
EISBN: 978-1-62708-349-2
... comprises the placement of a thin toughened resin between each ply of the composite structure. The first interlayer-modified composites consisted of two resins of different composition, with the interlayer resin being much tougher than the resin used in the intraply region (3M patent) ( Ref 27 ). Materials...
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 November 2010
DOI: 10.31399/asm.tb.scm.t52870255
EISBN: 978-1-62708-314-0
..., such as panel edges, closeouts, door and window sills, attachment fittings, or almost any location where the skin and core bond terminates. The majority of the damage is typically found at the edges of panels. Adhesive bond degradation will lower the skin-to-core bond strength, the fillet bond strength...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030177
EISBN: 978-1-62708-349-2
... of the modifier and uncured thermoset in which phase separation of the modifier occurs upon cure, forming distinct domains ( Ref 1 to 5 ). One of the most widely used materials for dispersed-phase-toughening of epoxy matrices are reactive liquid polymers (RLP), such as carboxyl-terminated butadiene...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870063
EISBN: 978-1-62708-314-0
... was PETI-5, a phenylethynyl terminated imide. A matrix resin, an adhesive, a RTM grade, and a resin film infusion grade of PETI-5 were developed during the program. As with other high-temperature resin systems that use high- boiling-point solvents for manufacturing—NMP in this case—management of volatiles...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2010
DOI: 10.31399/asm.tb.hss.t52790193
EISBN: 978-1-62708-356-0
.... In the 1950s, the Housewares Division of G.S.W., Ltd., Baie Urie, Quebec, brought out a line of three-ply cookware with 18-8 stainless steel on both sides of a carbon steel core. The idea was that the steel core would help distribute the heat because of its better thermal conductivity. The tri-ply material...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.9781627083096
EISBN: 978-1-62708-309-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.9781627083447
EISBN: 978-1-62708-344-7
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.9781627082617
EISBN: 978-1-62708-261-7