碳纤维束-圆辊细观接触行为研究  

Mesoscopic Contact Behavior between Carbon Tows and Round Roller

作　　者：王玉[1,2] 焦亚男[1,2] 杨志 谢军波 吴宁[1,2] WANG Yu;JIAO Yanan;YANG Zhi;XIE Junbo;WU Ning(Ministry of Education Key Laboratory of Advanced Textile Composite Materials,Institute of Composite Materials,Tiangong University,Tianjin 300387 China;School of Textile Science and Engineering,Tiangong University,Tianjin 300387 China)

机构地区：[1]天津工业大学复合材料研究院纺织复合材料教育部重点实验室,天津300387 [2]天津工业大学纺织科学与工程学院,天津300387

出　　处：《摩擦学学报》2022年第2期326-337,共12页Tribology

基　　金：天津市教委科研计划重点项目(2019ZD03);天津市教委科研计划项目(2018KJ195);天津市研究生科研创新项目(2020YJSB070);天津市高等学校创新团队培养计划(TD13-5043)资助。

摘　　要：为探索碳纤维束-圆辊的接触机制,本文中采用自制摩擦模拟试验装置,结合薄膜压痕法分析了纤维束接触部位的三维(3D)表面形貌,研究了预加张力和接触角度对碳纤维束-圆辊接触面积的影响规律.结果表明:碳纤维束-圆辊接触面内的纤维束取向度是影响接触面积的关键因素,当接触角度从60°增加到170°时,纤维束取向度逐渐减小,碳纤维束-圆辊接触面积也逐渐减小,且接触角度为60°时的接触面积是170°时的22倍;当预加张力从0.19 N增加到1.47 N时,纤维束取向度逐渐增大,碳纤维束-圆辊接触面积逐渐增大,且预加张力为1.47 N时的接触面积是0.19 N时的2倍.在Hertz接触理论的基础上,考虑纤维束取向度建立碳纤维束-圆辊接触面积的理论预测模型,通过试验数据验证了该模型能够准确预测碳纤维束-圆辊的接触面积.Textile composites have been widely used in aerospace,automotive,shipbuilding and construction fields due to their high specific strength,high specific modulus and high designability.Preform is the reinforced skeleton of textile composites,and tows,as the basic unit of preform,lose up to 5%~30%of its mechanical properties due to friction,compression and bending in the process of weaving and forming.Among them,the mechanical properties loss rate due to friction is as high as 9%~12%.However,researchers have conducted the friction and wear behavior of tows using different methods,the contact mechanism of tows in the process of friction and wear is still unclear.Different forming conditions of preforms will result in different contact surface morphology of tows,which seriously affects the mechanical property of preforms.Therefore,it is necessary for the study of friction mechanism to explore the contact mechanism between carbon tows and round roller.The contact area of tows is determined by the contact behavior of numerous fibers.Researchers have carried out a sea of research on the arrangement mode and mechanical properties of fiber in tows,but the quantitative relationship between the arrangement mode of fiber and the contact area of tows is rarely studied.In order to improve the prediction accuracy of tow’s contact area,a self-designed experiment device was used in this paper.Combined with the thin film indentation method,three-dimension(3D)surface morphology of the contact surface of tows was analyzed,and the effect of different pre-tension and contact angle on the contact area between carbon tows and round roller was studied.In consideration of fiber orientation,the theoretical prediction model of the contact area between carbon tows and round roll was established.Experimental value,Hertz model and modified model were analyzed by the test of significance.The results showed that the orientation of tows in the contact surface was a key factor of the contact area.When the contact angle increased from 60°to 170°

关 键 词：碳纤维 接触面积 接触角度 预加张力 HERTZ接触 

分 类 号：TH163[机械工程—机械制造及自动化]