针刺石英机织布损伤表征及针刺毡纤维分布取向的变化  

Damage characterization of quartz woven fabric and change of the fiber distribution orientation of needle punched quartz fiber felt

作　　者：杜培健 王心淼[1] 吕庆涛 张一帆[1] 陈利[1] DU Peijian;WANG Xinmiao;LV Qingtao;ZHANG Yifan;CHEN Li(Institute of Textile Composite Materials,School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学纺织科学与工程学院纺织复合材料研究院,天津300387

出　　处：《复合材料学报》2021年第1期268-278,共11页Acta Materiae Compositae Sinica

基　　金：天津市教委科研计划项目(2017KJ066);天津市科技重大专项与工程(18ZXJMTG00190);山西省科技重大专项(20181102022);天津市高等学校创新团队培养计划(TD13-5043)。

摘　　要：为探究针刺工艺中针刺密度的持续变化对3D针刺石英复合材料预制体中的机织石英布的损伤程度影响及对石英毡纤维分布取向的影响,采用体式显微镜对不同针刺密度下的机织物形貌的变化进行图像采集,并提出一种基于MATLAB软件可表征不同针刺密度对石英机织物损伤程度的方法。采用岛津AGS-250KNE拉伸试验机对不同针刺密度下的机织物样品进行拉伸性能测试,采用DHU-11非织造纤维取向分析仪对不同针刺密度下0°~180°范围内非织造石英毡的纤维取向分布进行测试。结果表明,当针刺密度分别为210刺/cm^(2)和245刺/cm^(2)时,相应的表征破损程度R值近似相等,即R_(210)=0.518近似等于R_(245)=0.515,可认为当针刺密度达到210刺/cm^(2)时,针刺机织物力学性能损伤达到极限;针刺密度为0时,非织造石英毡的纤维取向分布呈明显正态分布。同一针刺密度下的纤维取向分布在0°~15°和165°~180°范围内,及在90°下的纤维分布量明显大于其他角度下的纤维分布量,且随着针刺密度的增加,同一角度下的纤维取向分布量总体呈逐渐减小趋势。For exploring the effect of continuously changed needle punched density during the needle punching process on the damage degree of the quartz woven fabrics and the fiber orientation distribution of quartz nonwoven felt in preform of the 3D needle punched composites,stereomicroscope was used to gather the pictures,which recorded the changes in the macro morphology with different needle punched densities,and an approach based on MATLAB software to characterize the damage degree of the quartz fabric woven was presented.Shimadzu AGS-250 KNE universal testing machine was used to test the tensile property of the quartz woven fabrics under different needle punched densities.DHU-11 nonwoven felt orientation distribution testing machine was used for testingthe fiber orientation distribution of the quartz nonwoven felts under different needle density values and angle range of 0°~180°.The results of the experiment indicate that the R value presenting to characterize damage degree of the quartz fabric woven is 0.518 when the needle punched density reaches 210 punches/cm^(2),which is approximatelyequal to the R value at 245 punches/cm^(2)(0.515).Therefore,it can be concluded that the damage degree of the quartz fabric woven has reached the limit when the needle-punched density reaches 210 punches/cm^(2).When the needle punched density is zero,the fiber orientation distribution of quartz nonwoven felt shows obvious normal distribution.The fiber orientation distribution amount within the angle range of 0°-15°,165°-180°and 90°is bigger than that of other angle range under the same needle punched density.Moreover,the fiber orientation distribution amount under the same angle tends to decrease gradually with the increase of the needle needle punched density.

关 键 词：3D针刺预制体 针刺密度 石英机织布 损伤程度 纤维分布取向 

分 类 号：TB332[一般工业技术—材料科学与工程] TB383