剪切变形对各向异性织物主渗透率及浸润特性的影响  

Effect of shear deformation on principal permeability and infiltration characteristics of anisotropic fabrics

作　　者：王珏[1] 晏石林[1] 李永静 何龙飞 谢翔宇 孟晓旭 WANG Jue;YAN Shilin;LI Yongjing;HE Longfei;XIE Xiangyu;MENG Xiaoxu(Key Laboratory of Theory and Application of Advanced Materials Mechanics,Wuhan University of Technology,Wuhan,Hubei 430070,China;College of Environment Studies,Tohoku University,Sendai 980-8579,Japan)

机构地区：[1]武汉理工大学新材料力学理论与应用湖北省重点实验室,湖北武汉430070 [2]东北大学环境科学研究科,日本仙台980-8579

出　　处：《纺织学报》2024年第12期109-117,共9页Journal of Textile Research

摘　　要：树脂传递模塑成型工艺(RTM)中剪切变形会导致织物预成型体几何形式发生改变,为研究剪切变形对织物预成型体的体积分数、渗透率及填充浸润的影响,针对低黏度液体设计并建立了恒流条件下径向流动实验测量系统,考察了一般各向异性织物发生剪切变形后主渗透率、主渗透率方向、各向异性度及浸润特性的影响规律。结果表明:恒定流量下,随着剪切角的增加,主渗透率值逐渐减小,织物的渗透率各向异性度逐渐增加,主渗透率方向与x轴夹角逐渐减小;不同剪切角度对入口压力及填充浸润时间具有一定影响,剪切角越大,填充浸润时入口压力越大,织物完全浸润所需的时间越长;数值模拟可准确预测充模过程中的浸润特性。Objective Based on the resin transfer molding process,Shear deformation will change the fabric structure,which directly reduced the fiber bundle spacing and porosity and affected the permeability and main permeability direction of the fabric.In order to ascertain the governing principles.the effect of shear deformation on the principal permeability component of anisotropic fiber fabrics,permeability anisotropy,principal permeability direction,inlet pressure,and the time required for filling and infiltration is investigated to lay the foun-dation for practical applications and verified with numerical simulations.Method An experimental measurement system for the radial flow of a low-viscosity liquid(corn oil)under constant flow conditions was designed and set up using a plain glass woven fabric(fabric face density of 0.482 kg/m^(2) and glass fibric density of 2500 kg/m^(3).The warp and weft yarn density was 1105 tex,while the warp density was 30 pieces/(10 cm)and the weft density was 22 pieces/(10 cm))with rectangular pores.The principal permeability component was obtained using the permeability formula for anisotropic fabrics and the inlet pressure change was recorded by the pressure transducer in the process of filling and infiltration.Result As the shear angle was increased from 0°to 30°,the internal porosity of the fabric was decreased and the fiber volume fraction was increased.At shear angles between 10°-20°,the fiber volume fractions obtained from the theoretical equations were basically the same as the experimental values;while at the shear angle of 30°,the theoretically predicted fiber volume fraction was about 0.8%higher than the experimentally tested value.With the increase of the shear angle,the magnitude of the principal permeability K_(1) and K_(2) showed a significant decreasing trend,in which K 1 decreased from 20.20×10^(-10) m^(2) to 11.44×10^(-10) m^(2) and K 2 from 16.1×10^(-10) m^(2) to 6.31×10^(-10) m^(2),the degree of anisotropy of the fiber fabric increased by 1.6%and 12.0%,and the a

关 键 词：树脂传递模塑成型工艺 剪切变形 主渗透率 浸润特性 各向异性 数值模拟 玻璃纤维织物 

分 类 号：TB332[一般工业技术—材料科学与工程]