炭纤维单丝微滴界面应力分布的拉曼光谱分析  

Interfacial stress distributions of carbon fiber filament/microdroplet studied by Raman spectroscopy

作　　者：程朝歌 全海宇[2,3] 吴琪琳[1,3] 杨序纲[3] 

机构地区：[1]纤维材料改性国家重点实验室,上海201620 [2]得克萨斯理工大学化学与生物化学系,德克萨斯79409 [3]东华大学材料学院,上海201620

出　　处：《炭素技术》2016年第4期21-25,共5页Carbon Techniques

基　　金：国家自然科学基金(60975059);上海市教育委员会科研创新重点项目(14zz069)

摘　　要：采用激光拉曼光谱技术研究了聚丙烯腈基炭纤维/环氧树脂微滴的微观力学性能。根据炭纤维应变与G峰拉曼位移之间的关系,使用自制的微加载装置,讨论了微滴在不同应变情况下的层间剪切应力和应力传递效应。实验发现,无论是否受外力,微滴中纤维所受总应力均呈"驼峰"形状分布,界面剪切应力最大值出现在微滴的边缘区域。进一步研究发现,外载作用力影响纤维与树脂基体间的应力传递效应。Laser Raman spectroscopy has been used as a tool to study on the micromechanical behaviors of PAN-based carbon fiber filaments in epoxy resin microdroplets. Based on the relationship between strain and G peak Raman shift, the interfacial shear stress and stress transfer efficiency of microdroplets under different strain have been discussed using self-made device. The results showed that the stresses of fibers within microdroplet, either or not subjected to external forces, exhibited ＂hump＂-shaped distribu- tion and the maximum interfacial shear stress existed at the edge of microdroplet. Furthermore, external forces have influences on the stress transfer efficiency between fiber and resin matrix.

关 键 词：炭纤维 拉曼光谱 应力分布 界面 

分 类 号：TB332[一般工业技术—材料科学与工程] O657.37[理学—分析化学]