开孔位置对三维机织复合材料连接性能的影响
Effect of opening position on the connection performance of 3D woven composite materials
张一帆 1史志伟 1张茜 1刘燕峰 2张代军 2陈利1
作者信息
- 1. 天津工业大学 先进纺织复合材料教育部重点实验室,天津 300387;天津工业大学 纺织科学与工程学院,天津 300387
- 2. 中国航发北京航空材料研究院先进复合材料国防科技重点实验室,北京 100095
- 折叠
摘要
为了揭示织物结构和开孔位置对三维机织复合材料开孔连接性能与失效机制的影响,设计并制备了3种不同结构的三维机织复合材料,对不同开孔位置连接结构的承载性能和损伤模式进行了研究.研究表明,端径比(E/D)对不同结构参数的复合材料的影响存在差异,当E/D从3减小到2时,3种结构复合材料极限挤压强度分别下降5.3％、9.9％和5.9％;E/D从2减小到1时,极限挤压强度分别下降73.3％、68.9％和69.8％.E/D从3减小到1时,复合材料的损伤模式由挤压损伤转变为界面脱粘及试样端部纱线脱粘,结构中各纱线层的损伤演化呈现明显角度特征.
Abstract
To reveal the effect of opening position on pinned-joints mechanical properties and failure mechanism of 3D woven composites,three different 3D woven composite structures were designed and prepared,and the load-bearing performance and damage modes of these composites with different opening positions was discussed.The results show that there are differences in the effect of end-diameter ratio(E/D)on composites with different struc-tural parameters.When the E/D decreases from 3 to 2,the ultimate compressive strength of three structural com-posites decreases by 5.3％,9.9％,and 5.9％,respectively.When the E/D decreases from 2 to 1,the ultimate compres-sive strength decreases by 73.3％,68.9％,and 69.8％,respectively.When the E/D changes from 3 to 1,the damage mode of the composites changes from extrusion damage to interfacial debonding,and the damage propagation of each yarn layer presents obvious angle features.
关键词
三维机织复合材料/多轴向/开孔位置/力学性能/失效机制Key words
3D woven composites/multiaxial/opening position/mechanical properties/failure mechanism引用本文复制引用
基金项目
国家科技重大专项项目(2017-Ⅶ-0011-0177)
航空发动机及燃气轮机基础科学中心项目(P2022-B-Ⅳ-014-001)
天津市海河实验室项目(22HHXCJC00007)
先进功能复合材料重点实验室基金(6142906210406)
出版年
2024
NETL
NSTL
万方数据