LCM中缝编铺敷工艺对面内渗透性的影响

复合材料科学与工程 ›› 2014, Vol. 0 ›› Issue (1): 28-34.

LCM中缝编铺敷工艺对面内渗透性的影响

蒋金华^1,2*, 陈南梁^1,2

1.东华大学纺织学院,上海201620;
2.产业用纺织品教育部工程研究中心,上海201620

收稿日期:2013-04-02 出版日期:2014-01-28 发布日期:2021-09-17
作者简介:蒋金华(1978-),男,博士,主要研究方向为产业用纺织品、复合材料、液体复合材料模塑成型加工与工艺及热塑性复合材料成型技术,jiangjinhua@dhu.edu.cn。
基金资助:
上海市科学技术委员会资助上海市自然科学基金项目(13ZR1400500);“十二五”国家科技支撑计划(2011BAE10B02);中央高校基本科研业务项目(13D110126);国家级大学生创新性实验项目(1210255028)

EFFECT OF STITCH AND OVERLAY PLACEMENT ON IN-PLANE PERMEABILITY IN LCM PROCESS

JIANG Jin-hua^1,2*, CHEN Nan-liang^1,2

1. College of Textiles, Donghua University, Shanghai 201620, China;
2. Engineering Research Center of Technical Textiles, Ministry of Education, Donghua University, Shanghai 201620, China

Received:2013-04-02 Online:2014-01-28 Published:2021-09-17

摘要/Abstract

摘要： 为研究液体模塑成型过程中树脂流体在面内流动渗透的情况,基于2D径向测试方法,采用布置线性传感器的2D渗透率测试装置,研究了织物预型件的不同缝编铺敷工艺对织物面内渗透性的影响。结果表明,不同缝编方式、铺敷形式及粘合剂处理对碳纤维织物内部流动行为和渗透性的影响显著。当缝编和铺敷加工而形成的流道与纤维束方向一致时,单向渗透率较高,但主渗透率K₁、K₂相差较大,各向异性系数较低。当流道与纤维束方向呈一定角度时,主渗透率差异性减小,面内渗透各向同性提高。热熔性粘合剂会在加工过程中产生粘结反应,粘合剂颗粒大小及分布的变化会改变织物内部及层间孔隙的尺寸效应。粘合剂反应融化后会形成团片状粘附在纤维束的表面,分布更加离散化,从而形成较大的沟槽和孔隙尺寸,使得渗透率提高。

关键词: 渗透率, 复合材料液体模塑成型(LCM), 铺敷, 缝编, 粘合剂, 树脂流动前峰

Abstract: To the study of resin in-plane flow in fabric preforms during the liquid composite molding (LCM) process, the influence of stitch mode and overlay placement styles and binder on the in-plane permeability of fabric performs were investigated by using of linear sensor device and 2D radial testing technique. The results indicate that the internal flow behavior and permeability in fabrics with different stitch and overlay placement styles and binder treatment are different significantly. If flow channels by stitch and overlay placement are along fiber direction, the permeability is higher along channel direction, which makes the principle permeabilities K₁ and K₂different significantly and flow anisotropically. If there is an angle between flow channels and fiber direction, the principle permeabilities are small difference and flow close to isotropy. The thermoplastic binder in preforms are melted in LCM process which can change the distribution of binder powders and internal pore sizes. The thermoplastic binder after melted reaction in preforms will form more discrete adhesion film groups on fiber surface and bigger channels and pores, so resin flow faster and have higher permeability than before melt reaction.

Key words: permeability, liquid composite molding (LCM), overlay placement, stitch, binder, resin flow front

中图分类号:

TB332
TQ327

蒋金华, 陈南梁. LCM中缝编铺敷工艺对面内渗透性的影响[J]. 复合材料科学与工程, 2014, 0(1): 28-34.

JIANG Jin-hua, CHEN Nan-liang. EFFECT OF STITCH AND OVERLAY PLACEMENT ON IN-PLANE PERMEABILITY IN LCM PROCESS[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(1): 28-34.

参考文献

[1] ST VEN T, WEYRAUCH F, MITSCHANG P, NEITZEL M. Continuous Monitoring of Three-dimensional Resin Flow through a Fibre Preform[J]. Composites: Part A, 2003,34: 475-480.
[2] WONG CC. Modelling the Effects of Textile Preform Architecture on Permeability[D]. University of Nottingham, 2006.
[3] 蒋金华, 汪泽幸, 陈南梁. LCM 中织物结构对 3D 渗透性的影响[J]. 玻璃钢/复合材料, 2012,(5): 80-84.
[4] 曹瑞谦, 胡红, 罗永康. 针织结构对复合材料渗透率的影响研究[J]. 玻璃钢/复合材料, 2010,(003): 48-51.
[5] 简抗抗, 张佐光, 顾轶卓, 孙志杰. 不同纤维堆积状态下饱和渗透率实验研究[J]. 复合材料学报, 2006,23(1): 31-36.
[6] 邵雪明, 杨娅君, 胡金莲. 不同布置缝合纱线对预制件渗透性的影响[J]. 纺织学报, 2003,24(3): 19-21.
[7] ENDRUWEIT A, GREGOR PM, LONG AC, JOHNSON MS. Influence of the Fabric Architecture on the Variations in Experimentally Determined in-plane Permeability Values[J]. Composites Science and Technology, 2006,66: 1778-1792.
[8] BICKERTON S, SOZER EM, SIMACEK PS, ADVANI SG. Fabric Structure and Mold Curvature Effects on Preform Permeability and Mold Filling in the RTM Process. Part II. Predictions and Comparisons with Experiments[J]. Composites: Part A,2000,31: 438-458.
[9] GEORG B, LIN Y. Influence of Fibre Distribution on the Transverse Flow Permeability in Fibre Bundles[J]. Composites Science and Technology, 2003,63: 2069-2079.
[10] 蒋金华. 纺织预型件结构参数与模塑成型复合材料树脂渗透性关系的研究[D]. 上海: 东华大学, 2011.
[11] 梁晓宁, 李炜, 罗永康, 张锦南. 厚铺层结构纤维增强体渗透性能研究[J]. 玻璃钢/复合材料, 2010,(001): 46-48.
[12] LOENDERSLOOT R. The Structure-Permeability Relation of Textile Reinforcements[D]. Enschede: University of Twente, 2006.
[13] RIEBER G, MITSCHANG P. 2D Permeability Changes due to Stitching Seams[J]. Composites: Part A, 2010,41: 4-7.
[14] RUDD CD, LONG AC, KENDALL KN, MANGIN CGE. Liquid Moulding Technologies: Resin Transfer Moulding, Structural Reaction Injection Moulding and Related Processing Techniques[M]. Abington Cambridge CB: Woodhead Publishing Ltd., 1997.
[15] DARCY H. Les Fontaines Publiques de Dijo[M]. Dalmont Paris, 1856.
[16] BEAR J.Dynamics of Fluids in Porous Media[M].Elsevier,1972.
[17] TANOGLU M, ROBERT S, HEIDER D, MCKNIGHT SH, BRACHOS V, JR. JWG. Efects of Thermoplastic Preforming Binder on the Properties of S2-glass Fabric Reinforced Epoxy Composites[J]. International Journal of Adhesion & Adhesives, 2001,21: 187-195.
[18] KITTLESON J, HACKETT S. Tackifier/Resin Compatibility is Essential for Aerospace Grade Resin Transfer Molding: proceedings of the 39th International SAMPE Symposium[C]. 1994.
[19] ROHATGI V, LEE LJ. Moldability of Tackified Fibre Preforms in Liquid Composite Molding[J]. Journal of Composite Materials, 1997,31: 720-744.