複合材成形時のフィラメント間樹脂流れに及ぼす界面ダイナミクスの影響の基礎検討(数値計算(2),一般講演)

概要

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We simulated resin-air flow among filaments during resin transfer molding, which is one of manufacturing processes of fiber reinforced plastics. To truck the resin-air interface, we employed Phase-Field Model, in which Cahn-Hilliard eq. described the interface motion. Navier-Stokes eq. coupled with Cahn-Hilliard eq. was numerically solved to analyze resin-air flows between symmetrically arranged filaments. Our result showed that the air remained in small interspace between the filaments while the resin flowed along fiber surface which could be wet well: the ends of the interspace were capped by the resin-air interface; the interfacial tension increased the pressure in the interspace; hence, the resin could not flow into the interspace owing to the positive pressure gradient. Complex interactions between wettability, surface tension and pressure gradient, associated with geometric structure of interspaces yielded the void.
日本流体力学会の論文
2008-09-04