纤维绕针弯曲阶段穿刺钢针针尖形态优化
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摘要
针对整体穿刺过程中纤维绕针弯曲阶段,穿刺钢针在纱线张力作用下处于压缩与弯曲的组合变形、钢针针尖在该张力的作用下产生位移,该位移导致钢针针尖与穿刺模板孔壁接触致使针尖被下行的穿刺模板破坏甚至出现整体穿刺工作不能进行的问题,建立穿刺钢针在纤维的绕针弯曲阶段的力学模型,根据该模型建立钢针针尖曲线及穿刺钢针结构尺寸、材料弹性模量等参数的函数关系,利用Matlab对选定的穿刺系统穿刺钢针针尖曲线次数进行了算例计算。通过算例在给定的参数下求解出针尖曲线为二次最为合理,验证了理论的合理性和可行性,为穿刺钢针在满足强度要求且不与穿刺模板孔壁接触条件下针尖曲线的设计提供理论依据。
Due to the effect of yarn tension on the puncture of the fiber during needle bending,the puncture needle has combination deformation of compressional and bending; The displacement causes the needle tip to contact with the wall of the puncture template,leading to the destruction of needle tip because of the decline of puncture template,even the problem that the overall puncturing work cannot be performed. The mechanical model of the puncture needle during the bending phase of the fiber around the needle is established,and the functional relation about the parameters of the needle tip curve,the puncture needle structure size and the material elastic modulus are established according to this model. The example about the degree of needle tip curve of the selected puncture system is calculated by Matlab,and gets the most reasonable results when the needle tip curve is a conic curve. The example verifys the rationality and feasibility of the theory,and provides the theoretical basis for the design of needle tip curve which satisfies the strength requirements and does not contact the hole wall of the puncture template.
Due to the effect of yarn tension on the puncture of the fiber during needle bending,the puncture needle has combination deformation of compressional and bending; The displacement causes the needle tip to contact with the wall of the puncture template,leading to the destruction of needle tip because of the decline of puncture template,even the problem that the overall puncturing work cannot be performed. The mechanical model of the puncture needle during the bending phase of the fiber around the needle is established,and the functional relation about the parameters of the needle tip curve,the puncture needle structure size and the material elastic modulus are established according to this model. The example about the degree of needle tip curve of the selected puncture system is calculated by Matlab,and gets the most reasonable results when the needle tip curve is a conic curve. The example verifys the rationality and feasibility of the theory,and provides the theoretical basis for the design of needle tip curve which satisfies the strength requirements and does not contact the hole wall of the puncture template.
引文
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[14]解惠贞,崔红,李瑞珍,等.穿刺结构参数对C/C复合材料拉伸性能的影响[J].固体火箭技术,2015(1):107-110.XIE Huizhen,CUI Hong,LI Ruizhen,et al. Effect of puncture structure parameters on tensile properties of C/C composites[J]. Solid state rocket technology,2015(1):107-110.
[15]胡健明,胡方田.含金属粉体碳布穿刺损伤与针尖形态研究[J].玻璃纤维,2012(3):29-32.HU Jianming,HU Fangtian. Puncture damage and tip shape of metallic powder carbon sheet[J]. Fiberglass,2012(3):29-32.
[2]朱建勋.细编穿刺织物的结构特点及性能[J].宇航材料工艺,1998(1):41-43.ZHU Jianxun. The structural characteristics and properties of fine weave pierced fabric[J]. Journal of Aerospace Materials and Technology,1998(1):41-43.
[3]朱建勋,何建敏,王海燕.正交叠层机织布整体穿刺工艺的纤维弯曲伸长机理[J].中国工程科学,2003. 5(5):59-62,69.ZHU Jianxun,HE Jianmin,WANG Haiyan. The mechanism of fiber bending and elongation in the integrated piercing process of orthogonal laminated woven fabrics[J]. Engineering Science. 2003,5(5):59-62,69.
[4]朱建勋,何建敏,周之刚,等.整体穿刺机织布顶弯模式下的钢针针尖形态优化[J].天津大学学报,2004,37(8):690-694.ZHU Jianxun,HE Jianmin,ZHOU Zhigang,et al. Optimizing of the form of steel needlepoint based on bending of woven in the integrated piercing process[J]. Journal of Tianjin University. 2004,37(8):690-694
[5]朱建勋.碳布整体穿刺织物编织工艺与结构参数优化[D].南京:东南大学,2004:10-24.ZHU Jianxun. Carbon fiber integrated piercing fabrics braiding technology and parameter optimization[D]. Nanjing:Southeast University,2004:10-24.
[6]乔志炜,胡方田.细编穿刺织物矩阵刚度优化设计的研究[J].玻璃纤维,2014(3):22-25.QIAO Zhiwei,HU Fangtian. Study on the optimum design of matrix stiffness for fine woven fabric[J]. fiber,2014(3):22-25.
[7]董九志,蒋秀明,杨建成,等.立体织物整体穿刺钢针阵列布放装置研制及实验验证[J].纺织学报,2015,36(3):115-120.DONG Jiuzhi,JIANG Xiuming,YANG Jiancheng,et al.Development and experimental verification of steel needle array placement device for solid fabric puncture[J]. Journal of textile,2015,36(3):115-120.
[8]周钰博,李艳霞,李敏,等.细编穿刺织物的数建模理论与实例[J].材料工程,2017,45(4):102-107.ZHOU Yubo,LI Yanxia,LI Min,et al. Mathematical modeling theory and example of fine woven fabric[J]. material engineering,2017,45(4):102-107.
[9]朱建勋,何建敏,周之刚,等.整体穿刺机织布顶弯模式下的钢针针尖形态优化[J].天津大学学报(自然科学与工程技术版),2004,37(8):690-694.ZHU Jianxun,HE Jianmin,WANG Haiyan,et al. Optimization of Z oriented needle tip shape based on fiber bending elongation model[J]. China Engineering Science,2003,5(9):18-21.
[10]朱建勋,何建敏,王海燕,等.基于纤维弯曲模式Z向钢针针尖形态优化[J].中国工程科学,2003,5(9):18-21.HU Jianming,HU Gang. Study on puncture damage and tip morphology of carbon cloth containing metal powder[J]. Glass fiber,2012(3):29-32.
[11]孙乐,王成,李晓飞,et al. C/C复合材料预制体的研究进展[J].航空材料学报,2018,38(2):86-95.SUN Le,WANG Cheng,LI Xiaofei,et al. Research progress of C/C composite prefabricated bodies[J]. Journal of aeronauticl materials,2018,38(2):86-95.
[12]梁珩,童明波,王玉青,et al.细编穿刺C/C复合材料热导率数值模拟[J].固体火箭技术,2017,40(3):364-371.LIANG Wei,TONG Mingbo,WANG Yuqing,et al. Numerical simulation of thermal conductivity of fine-puncture C/C composites[J]. Solid state rocket technology,2017,40(3):364-371.
[13]吴小军,程文,周绍建,等.电耦合CVI制备穿刺C/C喉衬材料的微结构及性能[J].复合材料学报,2018,35(2):391-396.WU Xiaojun,CHENG Wen,ZHOU Shaojian,et al. Microstructure and properties of C/C laryngeal lining materials prepared by electro-coupled CVI[J]. Journal of composite Materials,2018,35(2):391-396.
[14]解惠贞,崔红,李瑞珍,等.穿刺结构参数对C/C复合材料拉伸性能的影响[J].固体火箭技术,2015(1):107-110.XIE Huizhen,CUI Hong,LI Ruizhen,et al. Effect of puncture structure parameters on tensile properties of C/C composites[J]. Solid state rocket technology,2015(1):107-110.
[15]胡健明,胡方田.含金属粉体碳布穿刺损伤与针尖形态研究[J].玻璃纤维,2012(3):29-32.HU Jianming,HU Fangtian. Puncture damage and tip shape of metallic powder carbon sheet[J]. Fiberglass,2012(3):29-32.