摘要
为了分析碳纤维复合材料的固化缺陷(如未浸润纤维和树脂气泡)产生机理及其影响因素,通过控制固化工艺中树脂浸润时间(2、4、6 h),制备了3种不同缺陷比例下的碳纤维平纹复合材料。提出并建立了含有随机孔隙缺陷的碳纤维平纹复合材料剪切模型。结果显示:碳纤维平纹复合材料中缺陷分布主要集中于出树脂区,且复合材料整体力学性能随着固化过程中浸润时间增加而提高,表现在最小浸润时间(2 h)复合材料的剪切强度与模量是最大浸润时间(6 h)的77.1%和85.6%。同时,建立的含缺陷碳纤维单胞剪切模型与实验结果拟合较好,误差值控制在3%~8%之间,为碳纤维平纹复合材料的力学性能预测提供一种更简便的单胞模型预测模式。
In order to analyze the mechanism and influencing factors of curing defects(e.g.dry fibers and resin bubbles)in carbon fiber composites,three different defect ratios of carbon fiber plain weave composites(CFPWC)were prepared by controlling the resin infiltration time(2,4,6 h)in the curing process.A shear model for CFPWC with random pore defects was proposed and established.The results show that the defect distribution of CFPWC is mainly concentrated in the resin area,and the overall mechanical properties are improved with the increase of infiltration time in the curing process.This is manifested in the shear strength and modulus of the composites being 77.1%and 85.6%of the maximum infiltration time(6 h)at the minimum infiltration time(2 h).At the same time,the defective carbon fiber unit cell shear model established can fit well with experimental results,providing a more convenient unit cell model prediction mode for the prediction of CFPWC mechanical properties..
作者
刘涛
朱瑞星
高毓璇
方智
陈跃
雷杏玉
LIU Tao;ZHU Ruixing;GAO Yuxuan;FANG Zhi;CHEN Yue;LEI Xingyu(School of Textile Science and Engineering,Xi’an Polytechnic University,Xi’an 710048,China;North Changlong New Material Technology Co.Ltd.,Xi’an 710101,China;Shaanxi Kong Tian Rui Zhi De New Material Technology Co.Ltd.,Xianyang 713702,Shaanxi,China)
出处
《西安工程大学学报》
2025年第3期52-58,共7页
Journal of Xi’an Polytechnic University
基金
陕西省秦创原“科学家+工程师”队伍建设项目(2023KXJ-005)。
关键词
碳纤维平纹复合材料
树脂浸润时间
树脂/纤维缺陷率
剪切力学性能
剪切破坏模式
carbon fiber plain weave composites(CFPWC)
resin infiltration time
resin/fiber defect rate
shear mechanical properties
shear failure mode
