航空学报 > 2016, Vol. 37 Issue (12): 3843-3852   doi: 10.7527/S1000-6893.2016.0109

Z-pin增强复合材料帽型单加筋板弯曲性能

李吻, 李勇, 还大军, 褚奇奕, 肖军   

  1. 南京航空航天大学 材料科学与技术学院, 南京 210016
  • 收稿日期:2016-01-13 修回日期:2016-04-01 出版日期:2016-12-15 发布日期:2016-04-06
  • 通讯作者: 李勇,Tel.:025-84892980,E-mail:lyong@nuaa.edu.cn E-mail:lyong@nuaa.edu.cn
  • 作者简介:李吻,女,硕士研究生。主要研究方向:先进复合材料三维增强技术。Tel.:025-84892980,E-mail:liwen1206@126.com;李勇,男,博士,教授,博士生导师。主要研究方向:先进复合材料自动化制造及工艺。Tel.:025-84892980,E-mail:lyong@nuaa.edu.cn
  • 基金资助:

    航空科学基金(2015ZE52049);国家“973”计划(2014CB046501);江苏高校优势学科建设工程

Bending performance of composite single hat stiffener wall structure reinforced by Z-pin

LI Wen, LI Yong, HUAN Dajun, CHU Qiyi, XIAO Jun   

  1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2016-01-13 Revised:2016-04-01 Online:2016-12-15 Published:2016-04-06
  • Supported by:

    Aeronautical Science Foundation of China (2015ZE52049); National Basic Research Program of China (2014CB046501); A Project Funded by the Priority Academic Program Development of Jiangsu High Education Institutions

摘要:

针对复合材料帽型加筋壁板结构弯曲承载性能差的缺点,采用Z-pin增强技术提高弯曲承载性能。为研究Z-pin直径、体积分数、增强区长度对复合材料帽型加筋壁板弯曲性能的影响,制备了不同参数的Z-pin增强帽型加筋壁板试样并开展三点弯曲试验,对Z-pin增强机理及试样失效机制进行了分析。结果表明:随着体积分数的增加,由于Z-pin的桥联作用,Z-pin增强帽型加筋壁板弯曲性能提高,同时由于Z-pin植入产生的损伤增加,通过理论分析得到当Z-pin体积分数为2.6%时,弯曲峰值力达到最大值6.1 kN;Z-pin直径对帽型加筋壁板弯曲峰值力影响不显著;当Z-pin增强区长度为总长度的48%时,Z-pin增强帽型加筋壁板弯曲峰值力与全部植入Z-pin时基本相当。

关键词: 树脂基复合材料, 帽型加筋壁板, Z-pin, 连接性能, 三点弯曲

Abstract:

The Z-pin reinforcing technology is used to improve the less good bending bearing performance of composite hat stiffener wall structure. In order to study the influence of Z-pin volume fraction, Z-pin diameter and Z-pin reinforcing region length on the performance of hat stiffener wall structure polymer composites, the samples reinforced by Z-pin with different parameters are prepared and tested under three-point bending load. The Z-pin reinforcing mechanism and samples' failure mechanism are analyzed. The results show that the bending property of hat stiffener wall structures reinforced by Z-pin is improved with the increase of Z-pin volume fraction due to the bridging role of Z-pin, and the damage caused by Z-pin inserting increases. When the volume fraction of Z-pin is 2.6%, the bending peak load reaches the maximum value 6.1 kN through theoretical analysis. The effect of the diameter of Z-pin on the bending load of stiffener wall structures is not obvious. When the length of the Z-pin reinforcing region is 48% of the total length, the bending peak load of hat stiffener wall structure reinforced by Z-pin equals the bending peak load of samples with 100% Z-pin inserting length.

Key words: polymer composites, hat stiffener, Z-pin, joint performance, three-point bending

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