Influence of Overlay Placement and Fabric Architecture of Non-crimp Fabrics on In-plane and Transverse Permeability in Liquid Composite Molding  

作　　者：耿奕 蒋金华 陈南梁 傅婷 

机构地区：[1]College of Textiles,Donghua University [2]Engineering Research Center of Technical Textiles,Ministry of Education,Donghua University

出　　处：《Journal of Donghua University(English Edition)》2016年第4期592-596,共5页东华大学学报（英文版）

基　　金：National Natural Science Foundation of China(No.11472077);Shanghai Natural Science Foundation,China(No.13ZR1400500);the Fundamental Research Funds for the Central Universities,China(No.2232015D3-01);Innovation Experiment Programs for University Students,China(Nos.201410255024,201510255118)

摘　　要：To study the resin flow and the permeability in fabric preforms during the liquid composite molding( LCM) process,influences of stitch and overlay placement styles on the internal flow behavior in-plane and transverse were investigated. The permeability tests were carried using unidirectional and biaxial noncrimp carbon fabric( NCF) by linear capacitance sensors and ultrasound monitor system. The results indicate that the internal flow behavior and permeability in plane with different stitch and overlay placement styles are significantly different. When flow channels formed by stitches penetrate along the fiber direction,the permeability is high in one direction, which makes the in-plane principle permeabilities K_1 and K_2 significantly different. When there is an angle between the flow channel and fiber direction,the in-plane principle permeabilities on all directions are nearly the same and the flow process is close to isotropy. As to transverse permeability,the exist of flow channels on thickness influences it greatly and it is about 1-2 orders of magnitude lower in unidirectional fabric than that in biaxial NCF.To study the resin flow and the permeability in fabric preforms during the liquid composite molding（ LCM） process,influences of stitch and overlay placement styles on the internal flow behavior in-plane and transverse were investigated. The permeability tests were carried using unidirectional and biaxial noncrimp carbon fabric（ NCF） by linear capacitance sensors and ultrasound monitor system. The results indicate that the internal flow behavior and permeability in plane with different stitch and overlay placement styles are significantly different. When flow channels formed by stitches penetrate along the fiber direction,the permeability is high in one direction, which makes the in-plane principle permeabilities K1 and K2 significantly different. When there is an angle between the flow channel and fiber direction,the in-plane principle permeabilities on all directions are nearly the same and the flow process is close to isotropy. As to transverse permeability,the exist of flow channels on thickness influences it greatly and it is about 1-2 orders of magnitude lower in unidirectional fabric than that in biaxial NCF.

关 键 词：permeability fabric overlay directions unidirectional molding placement filling porosity isotropy 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ327[化学工程—合成树脂塑料工业]