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honeycomb-cored sandwich panels

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Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009083
EISBN: 978-1-62708-177-1
... Abstract Honeycomb-cored sandwich panels increase part stiffness at a lower weight than monolithic composite materials. This article illustrates an area of a honeycomb-cored sandwich structure composite cross section that is viewed using transmitted polarized light. This area shows...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003388
EISBN: 978-1-62708-195-5
... Honeycomb Cores 1815 Effect of Shear Strength on Maximum Loads of Sandwich Columns 1817 Short-Column Compressive Strength of Sandwich Constructions as Affected by the Size of the Cells of Honeycomb-Core Materials 1827 Edgewise Compressive Strength of Panels and Flatwise Flexural Strength...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003037
EISBN: 978-1-62708-200-6
... as a structural product appeared just after 1940 in aircraft sandwich panel construction. Most honeycomb used today is adhesively bonded core that is subsequently bonded to facings to form a sandwich panel. Other common types of honeycomb cores presently being produced include metallic cores of corrosion...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003375
EISBN: 978-1-62708-195-5
..., mechanical properties, environmental compatibility, formability, durability, and thermal behavior. The article provides information on the benefits and concepts of a sandwich panel containing lightweight structural cores. lightweight structural cores honeycomb structural cores balsa structural cores...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006457
EISBN: 978-1-62708-190-0
.... Honeycomb Sandwich Defects The most prominent defects found or generated in honeycomb sandwich assemblies are summarized in Table 1 . Adhesion and/or cohesion defects may also occur in bonded honeycomb sandwich assemblies. The metal-to-metal closure areas for honeycomb panels may exhibit the types...
Book Chapter

By Greg Kress
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003392
EISBN: 978-1-62708-195-5
.... Polymers are classified as being thermoplastic or thermoset. Other matrices : Metal, ceramic, carbon, glass Structural configurations: Solid laminate, sandwich panels, stiffened panels Core materials: Honeycomb, foam, wood, syntactic Processing options include: Manufacturing...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003489
EISBN: 978-1-62708-195-5
... of two thin, high-strength facings bonded to a thick, lightweight core. Each component by itself is relatively weak and flexible, but when combined into a sandwich panel they produce a structure that is stiff, strong, and lightweight. A honeycomb sandwich panel, formed by adhesively bonding thin skins...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003457
EISBN: 978-1-62708-195-5
... damage, which produced a site for water to ingress ( Ref 12 ). Use of aluminum for the type of honeycomb further exacerbates the problem due to the fast rate of corrosion. “Aluminum honeycomb sandwich structures caused major problems on Air Force and Navy aircraft because of moisture ingress, core...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003456
EISBN: 978-1-62708-195-5
... applications. The three main configurations used in commercial aircraft composites are sandwich, stiffened-skin, and monolithic structures. Sandwich Structure Two forms of sandwich structures are found in aircraft applications: honeycomb panels and sandwich panels. Sandwich structures are the result...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003477
EISBN: 978-1-62708-195-5
... as a sandwich. Facesheets for these panels are made of carbon fiber or carbon fiber combined with aramid or fiberglass fabric. Such panels most often employ self-adhesive 120 °C (250 °F) curing systems. Phenolic-coated fiberglass or Nomex (DuPont) honeycomb core is used. The panels are fabricated in a single...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003455
EISBN: 978-1-62708-195-5
... Abstract This article discusses the requirements for designing repairable composite structures such as a honeycomb sandwich panel construction and integrally stiffened co-cured composite structures. It reviews the general and specific design guidelines for bolted or riveted repairs...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003475
EISBN: 978-1-62708-195-5
... are usually thin, and most components are, in fact, sandwich structures with composite facesheets. Some sandwich panels consist of precured facesheets adhesively bonded to the aluminum honeycomb core. The “cocured” sandwich, in which the facesheet and the adhesive are cured simultaneously, is becoming common...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003444
EISBN: 978-1-62708-195-5
... for sandwich laminates and may require testing with the core material in specific orientations if the materials properties vary relative to the orientation, as with honeycomb core, for example. Fig. 8 Sandwich panel shear test set-up Transverse Tension The transverse tension strength...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003385
EISBN: 978-1-62708-195-5
... is buckling between the cell walls of a honeycomb core. Facesheet instability can also occur on foam cores. A simple, approximate equation for the mode was developed by Hoff and Mautner ( Ref 12 ), given by: (Eq 9) σ c r i t = c ( E f E c G cz ) 1 / 3 where E...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003366
EISBN: 978-1-62708-195-5
..., cured at 175 °C (350 °F) for 1 h at 1380 kPa (200 psi). Source: Ref 5 and 18 Phenolic Honeycomb Phenolic prepregs based on carbon, aramid, or glass fibers are used as face sheets on Nomex honeycomb to construct sandwich panels for aerospace applications such as cargo liners, walls, galleys...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003046
EISBN: 978-1-62708-200-6
... Repair The approach to honeycomb sandwich repair taken here is a scarf joint on both inner and outer eight-ply faces ( Fig. 8 ). The inner face is repaired first, following much the same procedure as that used for a blind-side monolithic laminate just discussed. The blind-side patch is a five-ply...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002194
EISBN: 978-1-62708-188-7
..., fiberglass, graphite, or aramid. Detailed information on the fabrication of honeycomb structures can be found in the article “Lightweight Structural Cores” in Composites , Volume 21 of the ASM Handbook. Fig. 2 Hexagonal cell honeycomb Fig. 3 Example of a bonded sandwich assembly...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003459
EISBN: 978-1-62708-195-5
.... As a general rule, resin damage leads to a greater loss in compressive strength than in tensile strength. Water Intrusion Water intrusion is especially a problem with honeycomb cores, resulting in weight gain, corrosion in aluminum honeycomb, and core cell ruptures and disbonds if water freezes...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003395
EISBN: 978-1-62708-195-5
..., precured and integrated, or bonded. Sandwich construction with honeycomb or foam results in lightweight alternatives to discretely stiffened panels. As the part count is reduced, the complexity of the components is increased. The structural design may be as extensive as the aft fuselage of the V-22 Osprey...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003407
EISBN: 978-1-62708-195-5
... construction, based on materials and processes little changed since the 1980s (polyester resin, chopped strand mat and woven rovings, hand laminating), to elevated- temperature cure, vacuum consolidation, and unidirectional prepreg tapes with honeycomb cores. Most custom or one-off builders use epoxy-resin...