Z-pin/缝合对复合材料T型接头剪切承载能力的影响

孔斌; 陈普会; 李梦佳; 彭涛; 姚正兰; 邱学仕

doi:10.13801/j.cnki.fhclxb.20170702.002

Z-pin/缝合对复合材料T型接头剪切承载能力的影响

1.
南京航空航天大学机械结构力学及控制国家重点实验室, 南京 210016;
2.
中国航空工业集团公司成都飞机设计研究所, 成都 610091

基金项目: 江苏高校优势学科建设工程资助项目

详细信息

通讯作者:
陈普会,博士,教授,博士生导师,研究方向为复合材料结构设计,E-mail:phchen@nuaa.edu.cn

中图分类号: V214.8;TB332
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出版历程
- 收稿日期: 2017-04-17
- 刊出日期: 2018-04-14

Effect of Z-pin/stitching on the shear carrying capacity of composite T-joints

1.
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2.
Chengdu Aircraft Design and Research Institute, Aviation Industry Comporation of China, Ltd., Chengdu 610091, China

摘要

摘要: 利用三维有限元模型对Z-pin/缝合增强试验件进行有限元分析，采用内聚力模型模拟界面的破坏情况，通过在分层的上下界面加入非线性弹簧元来模拟Z-pin/缝合的增强机制，非线性弹簧元的力学性能（桥联律）由细观力学方法获得。通过与试验结果的对比发现，由于未进行界面增强的T型结构的剪切承载能力已较高，Z-pin/缝合增强较难提高T型接头的剪切承载能力。从少数几种可提高T型接头的剪切承载能力的增强方案中可看到，应选择拉伸强度较高而拉伸模量较低的缝线来进行T型接头剪切界面增强设计。
- 复合材料 /
- T型接头 /
- Z-pin /
- 缝合 /
- 非线性弹簧
Abstract: Three-dimensional FEM models were used to simulate the Z-pin/stitching reinforced T-joint specimens. The interface failure was simulated with cohesive zone model, and the effect of Z-pin/stitching was simulated with nonlinear springs inserted into the interface. The mechanical properties of the spring, i.e. bridging law, were obtained based on a micromechanical approach. Comparing with experimental results and the FEM results, it is difficult to increase the shear carrying capacity of T-joints through Z-pin/stitching as the shear carrying capacity of unreinforced T-joint is quite high already. After analyzing the a few schemes which can increase the shear carrying capacity of T-joints, choosing stitch with high tensile strength and low tensile modulus was suggested to be used for the design of interface reinforcement.
- composite /
- T-joint /
- Z-pin /
- stitching /
- nonlinear spring

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