摘要
针对航空发动机风扇机匣用碳纤维三维编织复合材料,开展了预制体材料渗透特性的实验研究。实验模具为厚度可调的长方体中空结构。通过分析液体在厚度和孔隙率不同的4种三维编织预制体内的渗透过程,结果表明,所有预制体在面内的渗透主向与编织的轴/横向平行,且轴向渗透率约为横向渗透率值的3.2倍。液体在A预制体内的渗透性最好,其轴向、横向和厚度方向的渗透率值分别为1.136×10^(-10)、4.259×10^(-11)和5.900×10^(-12)m^(2),厚度方向上的渗透率远小于面内渗透率,差距在1~2个数量级。液体在预制体内3个方向上的渗透是相互影响的过程,预制体厚度方向上的渗透特性影响了面内的渗透特性。
Aiming at the carbon fiber three-dimensional braided composite material for the aero-engine fan case,the experimental research on the permeability characteristics of the preform material has been carried out.The experimental mold was a rectangular hollow structure,and the distance in the thickness direction was adjustable.By analyzing the permeation process of liquid in four kinds of three-dimensional braided preforms with different thickness and porosity,the results show that the in-plane permeation main direction of all preforms is parallel to the axis/transverse direction of the braid,and the axial permeability is about 3.2 times the value of the lateral permeability.The permeability of the liquid in the A preform is the best,and the permeability values in the axial,transverse and thickness directions are 1.136×10^(-10),4.259×10^(-11)and 5.900×10^(-12)m^(2),respectively.The permeability in the thickness direction is much smaller than the in-plane permeability,and the difference is 1—2 orders of magnitude.The permeation of liquid in three directions in the preform is a process of mutual influence,and the permeation characteristics in the thickness direction of the preform affect the permeation characteristics in the plane.
作者
周胜兵
姜又强
宁慧铭
胡宁
刘强
ZHOU Shengbing;JIANG Youqiang;NING Huiming;HU Ning;LIU Qiang(College of Aerospace Engineering,Chongqing University,Chongqing 400044,China;School of Mechanical Engineering,State Key Laboratory of Reliability and Intelligence Electrical Equipment,Hebei University of Technology,Tianjin 300401,China;AVIC Composite Technology Center,Beijing 101300,China)
出处
《青岛科技大学学报（自然科学版）》
CAS
2024年第1期77-84,共8页
Journal of Qingdao University of Science and Technology:Natural Science Edition
基金
国家“两机”重大专项基础研究项目(2017-Ⅶ-0011-0106).
关键词
三维编织预制体
渗透率
厚度
空隙率
碳纤维复合材料
three-dimensional woven preform
permeability
thickness
porosity
carbon fiber composite
