Cam elyaflarının gerinim değişim hızı kontrollü bastırma karakterizasyonu ve işlem parametrelerinin sonuçlar üzerine etkilerinin araştırması

Strain rate controlled compaction/decompaction experiments were performed on various e-glass fabric preforms by using a conventional Vacuum Infusion (VI) experimental setup integrated with a laser displacement measurement sensor. A PID controller was designed to control the strain, and the stress was measured in an actual VI setup. Compared to the available characterization procedures in the literature, this approach allows investigating effects of different phenomena (such as dry to wet transition; rate of loading/unloading; and fabric settling/relaxation at major/minor loading) and mimicking the fabric compaction as in the actual VI setup itself instead of using a separate characterization setup. The experimental data is fitted with a compaction model to investigate the elastic and viscous components of a viscoelastic compaction model. The database constructed in this study will be useful for the comparison of pressure and strain rate controlled compaction characterization experiments; and decide on which approach is more appropriate to represent the fiber compaction in VI.