Wicking Test per unidirezionali Tessuti: Misure di capillare parametri per valutare capillare pressione nei Processi Liquid Composite Molding

Overview

This article presents an experimental method for measuring geometrical parameters and apparent advancing contact angles in capillary wicking of synthetic and natural fabrics. The method is crucial for determining capillary pressures in liquid composite molding applications.

Key Study Components

Area of Science

• Composite manufacturing
• Capillary pressure measurement
• Liquid composite molding processes

Background

• Understanding fiber capillary pressure is essential for composite design.
• Formation of voids and dry spots in composites can affect performance.
• Standard tensiometers can be utilized for this method.
• Applicable to various types of reinforcement materials.

Purpose of Study

• To assess fiber capillary pressure values for composite molding.
• To provide insights into void formation in large composite parts.
• To demonstrate a reliable method for measuring capillary parameters.

Methods Used

• Cutting fabric strips perpendicular to the grain.
• Rolling fabric strips into tight cylinders.
• Wrapping samples in thin filter paper.
• Using a standard tensiometer for measurements.

Main Results

• Successful measurement of capillary parameters in fabrics.
• Demonstrated method can be applied to various composite reinforcements.
• Provided a framework for assessing capillary pressures in LCM.
• Highlighted the importance of sample preparation in obtaining accurate results.

Conclusions

• The proposed method is effective for measuring capillary wicking.
• It aids in understanding the implications for composite manufacturing.
• Future applications could enhance the design of composite materials.

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