The cellular core that makes the lightweight rigid sandwich panel possible. Aramid honeycomb is paper-thin sheets of meta-aramid (Nomex paper) or para-aramid (Kevlar paper) fiber, glued and expanded into a hexagonal-cell structure that reads like a beehive when you look down through it, then dipped in phenolic resin to stiffen the cell walls. Used as the core in aerospace sandwich panels (the structural and trim panels in every commercial airliner cabin, every race-car body panel, every premium boat / yacht hull-stiffener), where two thin facesheets (fiberglass-epoxy or carbon-fiber-epoxy) sandwich a 25-50mm core of honeycomb to produce a panel with bending stiffness many times that of equivalent solid material at a fraction of the weight. The hexagonal geometry is the engineered property — hexagons are the most efficient cell shape for compressive load per unit weight, and the cellular structure means the panel is mostly air. Buy from Hexcel (the dominant aerospace producer), Plascore, or specialty composite suppliers.
Cellular composite core, made by gluing parallel aramid-paper sheets (Nomex meta-aramid most common; Kevlar para-aramid for highest-performance grades), expanding the glued stack into hexagonal-cell array, then dipping the expanded honeycomb in phenolic resin and curing in an oven. Cell sizes typically 1/8 to 1/2 inch (3-12 mm) measured across the flats. Foil thickness (the wall thickness of each cell) typically 0.0015 to 0.005 inch (38-127 µm). Density depends on cell size + foil thickness, ranges 24-144 kg/m³ (very light for a structural material). Compressive strength stabilized 1-15 MPa depending on density. Crush strength 0.6-9 MPa. Shear strength varies with direction (the honeycomb has different shear properties along the L-direction (ribbon direction) and W-direction (transverse). Continuous service temperature 180-200 °C (Nomex base), higher for some specialty grades. Used as core in sandwich panels with FR4 / fiberglass / carbon-fiber facesheets bonded by structural film adhesive, autoclave-cured. The sandwich construction: two 0.5-2mm facesheets ± 25-50mm honeycomb core = a panel that is 90+ percent air by volume and competitive with thick aluminum plate for bending stiffness at 1/10 the weight. Aerospace certification per FAA / EASA standards (FAR 25.853 cabin flammability requirement is the key spec).
Principled BSDF defaults derived from the sphere fibrous finish. Reasonable seed for Blender, Substance, Keyshot, Rhino — tune per material. Or grab the whole library at once: ForMaterials library →
# finish: fibrous albedo #d4b888 metallic 0.00 roughness 0.70 ior 1.45 transmission 0.00 clearcoat 0.00 sheen 0.70 anisotropic 0.50
{
"albedo": "#d4b888",
"metallic": 0.0,
"roughness": 0.7,
"ior": 1.45,
"transmission": 0.0,
"clearcoat": 0.0,
"sheen": 0.7,
"anisotropic": 0.5
}
# Blender 4.x — Principled BSDF
# Aramid Honeycomb Core (Aerospace Sandwich Panel Core) · finish: fibrous
import bpy
mat = bpy.data.materials.new(name="mat_aramid_honeycomb")
mat.use_nodes = True
bsdf = mat.node_tree.nodes["Principled BSDF"]
bsdf.inputs["Base Color"].default_value = (0.6584, 0.4793, 0.2462, 1.0)
bsdf.inputs["Metallic"].default_value = 0.000
bsdf.inputs["Roughness"].default_value = 0.700
bsdf.inputs["IOR"].default_value = 1.450
bsdf.inputs["Transmission Weight"].default_value = 0.000
bsdf.inputs["Coat Weight"].default_value = 0.000
bsdf.inputs["Sheen Weight"].default_value = 0.700
bsdf.inputs["Anisotropic"].default_value = 0.500
# KeyShot 11+ — lux Python API, Generic material
# Aramid Honeycomb Core (Aerospace Sandwich Panel Core) · finish: fibrous
# Run from Window → Scripting Console
import lux
mat = lux.createMaterial(name="mat_aramid_honeycomb", materialType="Generic")
mat.setProperty("diffuse", (212, 184, 136)) # 8-bit sRGB
mat.setProperty("metallic", 0.000)
mat.setProperty("roughness", 0.700)
mat.setProperty("indexOfRefraction", 1.450)
mat.setProperty("transparency", 0.000)
mat.setProperty("coatingWeight", 0.000)
{
"_format": "Substance Designer / Painter \u2014 pbrMetalRough constants",
"_about": "Aramid Honeycomb Core (Aerospace Sandwich Panel Core) \u00b7 finish: fibrous",
"baseColor": {
"r": 0.6584,
"g": 0.4793,
"b": 0.2462
},
"metallic": 0.0,
"roughness": 0.7,
"ior": 1.45,
"opacity": 1.0,
"anisotropyLevel": 0.5,
"_notes": "Channels listed are the standard Substance pbrMetalRough output. Drop into a Uniform Color node per channel, or as the constant input on a layered stack."
}{
"asset": {
"version": "2.0",
"generator": "ForMatter"
},
"materials": [
{
"name": "mat_aramid_honeycomb",
"pbrMetallicRoughness": {
"baseColorFactor": [
0.6584,
0.4793,
0.2462,
1.0
],
"metallicFactor": 0.0,
"roughnessFactor": 0.7
},
"extensions": {
"KHR_materials_ior": {
"ior": 1.45
},
"KHR_materials_sheen": {
"sheenColorFactor": [
1.0,
1.0,
1.0
],
"sheenRoughnessFactor": 0.7
}
}
}
]
}# USD Preview Surface — UsdShade.MaterialLook prim attributes
# Aramid Honeycomb Core (Aerospace Sandwich Panel Core) · finish: fibrous
def Material "mat_aramid_honeycomb" {
token outputs:surface.connect = </mat_aramid_honeycomb/PreviewSurface.outputs:surface>
def Shader "PreviewSurface" {
uniform token info:id = "UsdPreviewSurface"
color3f inputs:diffuseColor = (0.6584, 0.4793, 0.2462)
float inputs:metallic = 0.000
float inputs:roughness = 0.700
float inputs:ior = 1.450
float inputs:opacity = 1.000
float inputs:clearcoat = 0.000
token outputs:surface
}
}
Hexcel / DuPont aramid-honeycomb technical literature; FAA AC 43.13 composite-repair guidance.
House vocabulary — terms ForMatter uses with intent.
Materials and processes for people who design and make things.
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Conway's Material World on raw materials, Lefteri's Making It on processes, Forty's Concrete and Culture, Sparke's Design in Context, Bürdek's Design: History, Theory and Practice of Product Design, Schröpfer's Material Design on materials in architecture, Winchester's The Perfectionists on tolerance, Minshall's Your Life Is Manufactured on the global supply chain, von Busch's Making Trouble on material activism, Were's How Materials Matter, Hegger / Drexler / Zeumer's Basics Materials, Untracht and McCreight on metalsmithing, USDA Forest Products Lab on woods, GIA on gemstones, Schott / CoorsTek / Toray / Owens Corning datasheets, MakeItFrom for verifiable property numbers, ASM Handbook, ISO standards. Museum holdings draw from the Met, MAD, V&A, Smithsonian American Art Museum, Newark Museum of Art, British Museum, Heard Museum, Smithsonian NMAI, Eiteljorg Museum, Philadelphia Museum of Art, Cranbrook Art Museum, and Grand Rapids Art Museum — collection-record permalinks only, designer overview pages and exhibition listings excluded. Voice blocks now ride on every entry kind — material, process, application, and finish — and include Ruskin on iron, Anni Albers on twining, Greg Lynn on the shred-and-teeth NURBS lineage, Pugin on the metal that won't be hammered, Barthes / Yanagi / Benjamin channeled within their philosophy; Sparke, Bürdek, Forty, Conway, Schröpfer, Minshall, von Busch, Lefteri, Pat Pruitt, Mary Lee Hu, Tom Joyce, Albert Paley, and the rest of the contemporary makers quoted verbatim with citation. All cited.
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