缝合复合材料T型加筋壁板拉伸性能研究

复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (3): 90-97.

缝合复合材料T型加筋壁板拉伸性能研究

宦华松, 文立伟^*, 肖军, 封桥桥

南京航空航天大学材料科学与技术学院,南京210016

收稿日期:2019-06-04 出版日期:2020-03-28 发布日期:2020-03-28
通讯作者: 文立伟(1970-),男,副教授,博士,主要从事复合材料自动化成型技术方面的研究,wenliwei@nuaa.edu.cn。
作者简介:宦华松(1994-),男,硕士研究生,主要从事复合材料自动化缝合方面的研究。
基金资助:
“高档数控机床与基础制造装备”科技重大专项(2016ZX04002-005)

RESEARCH ON TENSILE PROPERTIES OF T-STIFFENED COMPOSITE PANELS REINFORCED BY STITCHING

HUAN Hua-song, WEN Li-wei^*, XIAO Jun, FENG Qiao-qiao

College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics,Nanjing 210016, China

Received:2019-06-04 Online:2020-03-28 Published:2020-03-28

摘要/Abstract

摘要： 为了提高复合材料T型加筋壁板中筋条与蒙皮的连接强度,引入缝合增强技术。利用自主研发的弯针缝合机器,并通过真空辅助树脂灌注技术(VARI)制备缝合T型接头试样,并对其进行拉伸实验,研究缝合对T型接头界面增强机理及不同缝合密度、缝线细度对T型接头拉伸性能的影响规律。结果表明:缝合细度为1000 D,缝合密度在0~10×10范围内,缝合增强T型接头拉伸极限载荷随缝合密度的增加而增加,缝合密度为10×10的缝合增强T型接头比未缝合接头极限载荷提高了38%,缝合密度在10×10~-8×8范围内,缝合T型接头拉伸极限载荷呈下降趋势;缝合密度为10×10,缝线细度在0~1000 D范围内,缝合T型接头拉伸承载力随缝线的增粗而增加,缝线细度增加至1500 D时,T型接头拉伸极限载荷呈下降趋势。缝合密度和缝线细度的变化对T型接头初始失效载荷影响不显著。

关键词: T型接头, VARI, 缝合密度, 缝线细度, 拉伸实验

Abstract: In order to improve the joint strength between the ribs and the skin in the T-reinforced wall panel of the composite material, stitching reinforcement technique is introduced. The self-developed curved needle sewing machine is used to prepare the suture T-joint sample by vacuum assisted resin infusion technique (VARI), and the tensile test is carried out to study the interface strengthening mechanism of the T-joint and the influence of stitch density and stitch fineness on the tensile properties of T-joint. The results showed that when stitching fineness is 1000 D and the stitching density is in the range of 0-10×10, the tensile limit load of the suture-reinforced T-joint increased with the increase of the stitching density. The ultimate load of stitched reinforced T-joints with stitch density of 10×10 is 38% higher than that of unstitched joints. The ultimate tensile load of stitched T-joints tends to decrease in the range of stitching density of 10×10-8×8. When the stitching density is 10×10, and the stitch fineness is in the range of 0-1000 D,the tensile load-carrying capacity of the T-joint increases with the thickening of the suture, and the tensile limit load of the T-joint decreases when the stitch fineness increases to 1500 D. The change in stitch density and seam fineness has no significant effect on the initial failure load of the T-joint.

Key words: T-joint, VARI, stitching density, stitching thread fineness, tensile test

中图分类号:

TB332

宦华松, 文立伟, 肖军, 封桥桥. 缝合复合材料T型加筋壁板拉伸性能研究[J]. 复合材料科学与工程, 2020, 0(3): 90-97.

HUAN Hua-song, WEN Li-wei, XIAO Jun, FENG Qiao-qiao. RESEARCH ON TENSILE PROPERTIES OF T-STIFFENED COMPOSITE PANELS REINFORCED BY STITCHING[J]. Composites Science and Engineering, 2020, 0(3): 90-97.

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