上海交通大学学报(自然版) ›› 2015, Vol. 49 ›› Issue (09): 1404-1410.

• 航空、航天 • 上一篇    下一篇

Z-pin增强复合材料T型接头拉伸数值模拟与参数分析

陈绍卿1,陈秀华1,孔斌2,汪海1,邱学仕2   

  1. (1. 上海交通大学 航空航天学院, 上海 200240; 2. 成都飞机设计研究所, 成都 610091)
  • 收稿日期:2014-10-29

A Numerical Simulation and Parametric Study of Z-Pin Reinforced Composite T-Joints at Tensile Load

CHEN Shaoqing1,CHEN Xiuhua1,KONG Bin2,WANG Hai1,QIU Xueshi2   

  1. (1. School of Aeronautics and Astronautics, Shanghai Jiaotong University, Shanghai 200240, China;2. Chengdu Aircraft Design and Research Institute, Chengdu 610091, China)
  • Received:2014-10-29

摘要:

摘要:  利用内聚力模型建立了Zpin增强复合材料T型接头拉伸破坏过程的数值分析模型,并对Zpin的分布进行参数分析.通过Zpin桥联试验得到Zpin拔出的位移-载荷曲线,再将该曲线转化为Zpin所在区域的界面单元属性,从而模拟Zpin对T型接头性能的增强效果.通过静力拉伸试验验证了该模型的可靠性.在此基础上分析了不同Zpin分布对T型接头拉伸性能的影响,结果表明:Zpin列距越小则拉脱载荷及极限位移越大,Zpin行距的变化对结构承载能力影响较小,而Zpin与中轴面的距离增大会使拉脱载荷呈线性减小的变化趋势.
关键词:  复合材料; T型接头; Zpin; 内聚力模型; 参数分析
中图分类号:  V 214.8; TB 332文献标志码:  A

Abstract:

Abstract: A numerical simulation model for the tensile process of Z-pin reinforced composite T-joints was established by utilizing the cohesive zone model and a parametric study was performed for the distribution of Z-pins. The force-displacement curve of the Z-pin pullout process was obtained by the experiments of Zpin bridging laws. This curve was transformed into the cohesive parameters of the pinned region to simulate the enhancement of  Z-pins to T-joints. The reliability of this model was verified by the static tensile test. Based on the proposed model, the influence of the Z-pin distribution on the tensile capability of T-joints was examined. The results show that as the column spacing decreasers, the pullout force and ultimate load increase. The row spacing has a small effect on the structural bearing capacity. The pullout force is decreased significantly when the distance between Z-pins and the axial plane is increased.
 

Key words: composite, T-joints, Z-pin, cohesive zone model, parametric study