Chung Hae Park

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We propose modeling and simulation of the void formation and the tow saturation in liquid composite molding processes. The present model addresses the void formations in the macropore between fiber tows as well as in the micropore inside fiber tows. We also consider the bubble compression and tow saturation after voids are formed at the flow front. Finally,(More)
It is an important topic to measure the through-thickness permeability of fiber reinforcements as the resin flow in the thickness direction is widely employed in many composites manufacturing techniques. Continuous techniques for the permeability measurement by simultaneous fabric compaction and liquid flow have been recently proposed as an alternative way(More)
In general, permeability measurement results show a strong scattering according to the measurement method, the type of test fluid and the fluid injection condition, even though permeability is regarded as a unique property of porous medium. In particular, the discrepancy between the unsaturated and saturated permeabilities for the same fabric has been(More)
The modelling of composite manufacturing processes where hydro-mechanical coupling takes place depends on the validity of compressibility and permeability models. In this work, the computer code initially used to simulate the effect of coupled hydromechanical load on composite preform [2] is integrated into an inverse method to predict the compaction(More)
Multicellular models were developed to predict contaminant dispersion in a three-dimensional (3-D) space. The method utilized in this study was patterned after models which have been developed for water pollution in lakes and streams. This approach involved (1) design of cell structures to accommodate the geometry and mass flow characteristics of the 3-D(More)
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