Effect of fiber breakage defect and waviness defect on compressive fatigue behavior and damage evolution of 3D multiaxial braided composites  

作　　者：Yan SUN Yifan ZHANG Tao LIU Yunjuan JING Jun MA Yao LU Chan WANG Xinhai HE Xiaogang CHEN Wei FAN 

机构地区：[1]School of Textile Science and Engineering,Xi’an Polytechnic University,Xi’an 710048,China [2]Key Laboratory of Advanced Textile Composite Materials,Ministry of Education,Tiangong University,Tianjin 300387,China [3]Shaanxi Yuanfeng Textile Technology Research Co.LTD.,Xi’an 710038,China [4]Longi Green Energy Technology Co.LTD.,Xi’an 710068,China [5]Department of Textile Engineering and Materials,School of Materials,The University of Manchester,Manchester M139PL,UK [6]Key Laboratory of Functional Textile Material and Product of Ministry of Education,Xi’an Polytechnic University,Xi’an 710048,China

出　　处：《Chinese Journal of Aeronautics》2025年第2期491-504,共14页中国航空学报(英文版)

基　　金：supported by the National Natural Science Foundation,China(Nos.52073224,12472141 and 12002248);the Natural Science Foundation of Shaanxi Province,China(Nos.2023KXJ-034 and 2023KXJ-005);Xi’an Science and Technology Plan Project,China(No.2022JH-ZCZC-0004);the Young Talent Fund of University Association for Science and Technology in Shaanxi,China(No.20210509);the Scientific Research Project of Shaanxi Provincial Education Department,China(No.22JC035);Shaanxi Outstanding Youth Science Fund Project,China(No.2024JC-JCQN-03).

摘　　要：This paper reports the effects of fiber breakage defects and waviness defects on the compressive fatigue behavior and the progressive damage evolution process of 3D Multiaxial Braided Composites (3DMBCs). Combined with finite element compression simulation and ultra-depth microscope, the internal defect content of composites with different braiding angles was determined. The results demonstrate that the weakening effect of waviness and fiber breakage defects is greater than the strengthening effect of the braiding angle. This causes the fatigue resistance of 3DMBCs with the 31° braiding angle being better in both directions of 0° and 90°. The increase of 4° waviness and 10% fiber breakage defect results in the average fatigue life of composites being shortened by 48% and the energy consumption rate increased by 10% at 85% stress level in 90° compression direction. The alteration in loading direction modifies the included angle corresponding to the stress component. The stress component parallel to the fiber direction under compressive fatigue load leads to interfacial debonding in the composites, whereas the stress component perpendicular to the fiber direction results in pronounced shear failure.

关 键 词：Three-dimensional reinforcement DEFECTS Compression fatigue behavior Mechanical properties Crack propagation Numerical analysis 

分 类 号：TB3[一般工业技术—材料科学与工程]