학술논문
碳纤维三维编织预制体渗透特性实验研究 / Experimental Research on Permeability Characteristics of Carbon Fiber Three-Dimensional Woven Preform
Document Type
Academic Journal
Author
Source
青岛科技大学学报（自然科学版） / Journal of Qingdao University of Science and Technology(Natural Science Edition). 45(1):77-84
Subject
Language
Chinese
ISSN
1672-6987
Abstract
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 m2,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 pre-form material has been carried out.The experimental mold was a rectangular hollow struc-ture,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 m2,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 pre-form affect the permeation characteristics in the plane.
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 pre-form material has been carried out.The experimental mold was a rectangular hollow struc-ture,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 m2,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 pre-form affect the permeation characteristics in the plane.