含不同直径微脉管层合板拉伸性能研究  

Study of tensile properties of laminates containing microvascular channels with different diameters

作　　者：冉广陵 马埸浩 安子乾 赵大方 郭鑫[1] 程小全[1,2] RAN Guangling;MA Yihao;AN Ziqian;ZHAO Dafang;GUO Xin;CHENG Xiaoquan(School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China;Ningbo Institute of Technology,Beihang University,Ningbo 315800,China;Navigation and Control Technology Research Institute of China North Industries Group Corporation,Beijing 100089,China;AVIC Composites Co.,Ltd.,Beijing 101300,China)

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191 [2]北京航空航天大学宁波创新研究院,宁波315800 [3]中国兵器工业导航与控制技术研究所,北京100089 [4]中航复合材料有限责任公司,北京101300

出　　处：《北京航空航天大学学报》2024年第4期1405-1415,共11页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：针对微脉管对层合板力学性能的影响,对含不同直径微脉管层合板的拉伸性能进行研究。通过试验测量了含不同直径微脉管层合板的拉伸性能,得到拉伸强度与刚度。建立了含微脉管层合板的精细化有限元模型,综合考虑了微脉管引起的富树脂区、纤维局部弯曲和铺层局部纤维体积分数变化的影响,对含微脉管层合板的拉伸性能进行了分析,并得到了试验结果的验证。在此基础上,分别就微脉管方向和直径对层合板拉伸性能的影响进行了研究。结果表明:当微脉管垂直铺层方向时,使单向层合板纵向拉伸强度降低,但刚度基本不受影响;微脉管直径越大,拉伸强度降低幅度越大;与不含微脉管层合板相比,含直径为0.255 mm和0.4 mm微脉管的层合板拉伸强度分别下降了21.9%和39.9%,但刚度变化不超过1.4%;当微脉管直径变化时,层合板拉伸损伤与破坏过程也发生变化。In view of the influence of microvascular on the mechanical properties of laminates,the tensile properties of laminates with varying diameter microvascular channels were studied.Tensile strength and stiffness of laminates with varying diameter microvascular channels were determined by experimental measurements.A refined finite element model of laminates containing microvascular channels was established,which considered the effects of resin-rich area,fiber bending,and fiber volume fraction change,and the tensile properties of laminates containing microvascular channels were analyzed and the results were verified by the experimental results.On this basis,the effects of microvascular channel orientation and diameter were investigated.The results show that when the microvascular channel is laid in a vertical ply direction,it decreases the longitudinal tensile strength of the unidirectional laminate,but the stiffness is basically unaffected.The larger the diameter of the microvascular channel,the greater the reduction of tensile strength.The structural strength of the laminate containing microvascular channels with diameters of 0.255 mm and 0.4 mm is reduced by 21.9%and 39.9%,respectively,when compared to the tensile properties of the laminate without the channels;however,its stiffness changes less than 1.4%.The damage process of laminate also changes with the microvascular channel diameter.

关 键 词：复合材料层合板 自修复 微脉管 拉伸性能 有限元 

分 类 号：V215.22[航空宇航科学与技术—航空宇航推进理论与工程] TB332[一般工业技术—材料科学与工程]