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 / S...