Vakum destekli reçine transfer kalıplama işleminde farklı cam elyafları için sıkıştırma deneyleri

An experimental procedure was designed to realistically characterize the compaction behavior of e-glass fabric preforms during all stages of Vacuum Infusion (VI). To mimic VI, the loading (compaction) was done on a dry preform, and the unloading (decompaction) was done after the preform was saturated with the resin. When fabrics were wetted at constant full compaction pressure, a significant decrease in thickness was observed for the random type fabric, but not for the woven and biaxial fabrics and polypropylene distribution medium. The rate of change of thickness had different signs and order of magnitudes when various constant compaction pressures were applied during fiber relaxation stage. Thus, previous coupled compaction-mold filling models based on static relationship between thickness and compaction pressure do not appropriately simulate the compaction physics of VI. The time-dependent database output from this study is a useful and straightforward tool to model VI.