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honeycomb structure

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030223
EISBN: 978-1-62708-349-2
... Fig. 13.1 Honeycomb sandwich structure composite cross section (~1 μm ultrathin section) showing differences in the constituents and resin intermingling. Transmitted crossed polarized light with a 530 nm compensator plate. This micrograph and the insets are expanded to 200× magnification. (A–C...
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Published: 01 November 2010
Fig. 9.15 Examples of honeycomb structure closeouts More
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Published: 01 November 2010
Fig. 13.1 Honeycomb sandwich structure composite cross section (~1 μm ultrathin section) showing differences in the constituents and resin intermingling. Transmitted crossed polarized light with a 530 nm compensator plate. This micrograph and the insets are expanded to 200× magnification. (A–C More
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Published: 01 November 2010
Fig. 13.2 Ultrathin section of an area of a honeycomb sandwich composite structure showing the effects of core movement during manufacturing and the resulting deformation and separation of the prepreg plies. (a) Transmitted crossed polarized light, 20× objective. (b and c) Transmitted More
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Published: 01 November 2010
Fig. 13.3 Ultrathin section of areas of the honeycomb sandwich composite structure where resin was found to span the separated prepreg plies after core movement. (a) Transmitted light, phase contrast, 40× objective. (b and c) Transmitted light, phase contrast, 20× objective More
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Published: 01 November 2010
Fig. 13.5 Micrographs of an unprepared honeycomb sandwich composite structure after climbing drum peel testing showing the adhesive surface after failure and the separated honeycomb core. Dark-field illumination, 65 mm macrophotograph More
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Published: 01 November 2010
Fig. 13.6 (a) Micrograph of a honeycomb sandwich structure composite after climbing drum peel testing showing areas of the core remaining on the aramid fiber composite facesheet. The microcrack pattern of the composite facesheet was enhanced by the use of DYKEM Steel Red dye, which was applied More
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Published: 01 November 2010
Fig. 13.10 Failure of a honeycomb-cored sandwich structure composite with areas of poor fillet formation and inadequate bond strength between the prepreg and film adhesive. Bright-field illumination, 10× objective More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870255
EISBN: 978-1-62708-314-0
... of honeycomb panels and foam cores along with their respective applications and unique attributes. The chapter also discusses the cocuring process and its use in fabricating unitized structures. adhesive bonding composite processing honeycomb structures integral cocured structures SANDWICH...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030001
EISBN: 978-1-62708-349-2
... toughening. In addition, the chapter provides information on interlayer-toughened composites and honeycomb or foam structure composite materials. It also discusses the processes in optical microscopy of composite materials. References References 1. Halpin J.C. , The Role of the Polymeric...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.9781627083492
EISBN: 978-1-62708-349-2
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870517
EISBN: 978-1-62708-314-0
... selecting the structural repair method Condition Recommended Bolting Bonding Lightly loaded, thin (~<.10 in.) X X Highly loaded, thick (~>.10 in.) X … Peeling stresses high X … High reliability required X … Repairing honeycomb structure … X Adherend surfaces...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030147
EISBN: 978-1-62708-349-2
... and polished perpendicular to the fiber direction. Bright-field illumination, 10× objective. (b) Sectioned and polished parallel to the fiber direction. Bright-field illumination, 10× objective Fig. 8.9 Glass fabric prepreg honeycomb core composite with voids throughout the structure. Bright-field...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870333
EISBN: 978-1-62708-314-0
... be zoned to lower threshold values than noncritical lower-stressed areas. Carbon/epoxy laminates are usually scanned at around 5 MHz, while honeycomb assemblies require lower frequencies (1 or 2.25 MHz) to penetrate thicker structures. Foam-filled structures require even lower frequencies, with 250 kHz...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
... are lower than for the metallic structures. Even though the fourth design, the carbon/epoxy honeycomb, also scored low in damage tolerance and repairability, this structure was the one selected, primarily because of its outstanding stiffness, weight, and fatigue resistance. Although a detailed structural...
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Published: 01 November 2010
Fig. 8.9 Glass fabric prepreg honeycomb core composite with voids throughout the structure. Bright-field illumination, 5× objective More
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Published: 01 November 2010
Fig. 13.9 Micrograph of fillet separation from a composite facesheet in a honeycomb sandwich structure composite. The sample was mounted in Rhodamine-B-dyed epoxy casting resin. Slightly uncrossed polarized light, 10× objective More
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Published: 01 July 2009
Fig. 20.31 Cutaway view of a lightweight, closed-back, solid beryllium mirror revealing a honeycomb core structure made by using copper mandrels. Holes in the back plate, which were centered above each cell, facilitated removal of the tooling by nitric acid etching after the hot isostatic More
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Published: 01 November 2010
Fig. 13.4 Solvent-generated voids in the prepreg skins and fillet areas of a honeycomb sandwich structure composite. (a and b) Bag side. (c) Tool side. Epi-bright-field illumination, 5× objective. In these micrographs, there is evidence of some scratching on the polished surface. This is due More
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
... to other cured composites, honeycomb core, foam core, or metallic pieces. A number of possible adhesive bonding joint configurations are shown in Fig. 8.1 . The ability to make large bonded structures can eliminate a significant amount of the assembly costs. In addition to fabricating large bonded...