𝐓𝐨𝐝𝐚𝐲'𝐬 𝐊𝐍𝐎𝐖𝐋𝐄𝐃𝐆𝐄 𝐒𝐡𝐚𝐫𝐞 : 𝐌𝐞𝐜𝐡𝐚𝐧𝐢𝐜𝐚𝐥𝐥𝐲 𝐓𝐡𝐢𝐜𝐤, 𝐂𝐡𝐞𝐦𝐢𝐜𝐚𝐥𝐥𝐲 𝐓𝐡𝐢𝐧...

𝐓𝐨𝐝𝐚𝐲'𝐬 𝐊𝐍𝐎𝐖𝐋𝐄𝐃𝐆𝐄 𝐒𝐡𝐚𝐫𝐞

𝐌𝐞𝐜𝐡𝐚𝐧𝐢𝐜𝐚𝐥𝐥𝐲 𝐓𝐡𝐢𝐜𝐤, 𝐂𝐡𝐞𝐦𝐢𝐜𝐚𝐥𝐥𝐲 𝐓𝐡𝐢𝐧...

𝐂𝐚𝐫𝐛𝐨𝐧 𝐟𝐢𝐛𝐞𝐫 𝐜𝐨𝐦𝐩𝐫𝐞𝐬𝐬𝐢𝐨𝐧 𝐨𝐟𝐭𝐞𝐧 𝐬𝐭𝐚𝐫𝐭𝐬 𝐛𝐞𝐟𝐨𝐫𝐞 𝐭𝐡𝐞 𝐥𝐚𝐦𝐢𝐧𝐚𝐭𝐞 𝐥𝐨𝐨𝐤𝐬 𝐠𝐮𝐢𝐥𝐭𝐲:

misalignment → microbuckling → kink-band formation...



That is why ORNL’s three-lobed filament is clever. The shape works twice:


▫️Mechanically thick: Higher area moment of inertia → more resistance to local fiber bending.


▫️Chemically thin: Shorter oxygen diffusion path during PAN oxidation → faster, more uniform core stabilization. That matters because oxidation is slow. If oxygen reaches the center faster, line speed can go up without leaving an under-stabilized core.


Less hidden core and more perimeter.

Compression and throughput attacked from the same cross-section.


📚Source(s):

DOE-funded researchers developing high-throughput, low-cost carbon fiber — CompositesWorld

Initial Assessment of Alternative Carbon Fiber Geometries — ORNL / Sandia National Laboratories / Montana State University


#Composites #CarbonFiber #CFRP #CompositeManufacturing #AdvancedMaterials

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