考虑层间和界面的玻璃纤维/环氧复合材料吸湿扩散实验和仿真  

Experimental/numerical investigation of moisture diffusion in glass/epoxy composites in consideration of interlamination and interphase

作　　者：朱礼宝 戴文喜 李永清[1] 朱锡[1] 朱子旭 ZHU Li-bao;DAI Wen-xi;LI Yong-qing;ZHU Xi;ZHU Zi-xu(College of Naval Architecture and Ocean Engineering,NavalUniversity of Engineering,Wuhan 430033,China;China ShipDevelopment and Design Center,Wuhan 430064,China)

机构地区：[1]海军工程大学舰船与海洋学院,武汉430033 [2]中国舰船研究设计中心,武汉430064

出　　处：《材料工程》2019年第11期84-91,共8页Journal of Materials Engineering

基　　金：省部级基金(3020301020205)

摘　　要：为研究复合材料层间和界面对吸湿扩散系数的影响,开展单向玻璃纤维/环氧复合材料和纯环氧树脂的吸湿实验,获取复合材料的三维扩散系数。采用光学显微镜和原子力显微镜分别获取复合材料层间和界面的参数。依据实验结果,建立包含层间和界面的复合材料瞬态扩散与稳态扩散有限元模型。结果表明:复合材料沿纤维方向的扩散系数大于纯树脂的扩散系数,垂直于纤维的两个方向的扩散系数不相等。包含层间的有限元模型能更真实地反映复合材料的结构及其吸湿过程,层间对垂直于纤维方向的扩散起促进作用。纬纱对沿其方向扩散的促进作用明显。为拟合复合材料的三维扩散系数,需要考虑界面扩散性能的正交各向异性。In order to investigate the influence of the composite interlamination and interphase on the moisture absorption diffusivity,moisture absorption experiments were conducted on both unidirectional glass/epoxy composite and pure epoxy resin and the composite three dimensional diffusivities were obtained.The composite interlamination and interphase were observed by optical microscope and atomic force microscope,separately.Based on the experimental results,the composite transient diffusion finite element(FE)models and steady diffusion FE models were established,taking account of interlamination and interphase.Results show that the composite diffusivity along the fiber direction is larger than that in the direction transverse to the fiber.Diffusivities of the two directions transverse to the fiber were different.FE models with interlamination can more realistically reflect the composite structure and its moisture absorption process.Interlamination promotes diffusion in the direction transverse to fiber and warp affects the diffusivity apparently.The orthotropic interphase properties need to be considered to fit the three dimensional composite diffusivities.

关 键 词：复合材料 吸湿行为 层间 纤维/基体界面 

分 类 号：TB332[一般工业技术—材料科学与工程]