第31卷第9期 2016年9月
文章编号：1000-324X(2016)09-0969-07
无机材料学报 Journal of Inorganic Materials
Vol. 31 No. 9 Sep-,2016
DOI:10.15541/jim20160049
碳纤维增强层状木材陶瓷的界面结构及受力分析
孙德林，郝晓峰，洪璐，唐志宏，张绍明(中南林业科技大学家具与艺术设计学院，长沙410004)
摘要：为了研究纤维增强木材陶瓷复合材料的界面结构与受力情况，利用液化木材、炭粉和碳纤维制备层状结构木材陶瓷。采用扫描电镜和高分辨率透射电镜对其基本结构与界面进行观测，并通过显微拉曼光谱检测拉伸试件 G'峰的位移来判断界面的结合情况。同时，基于双线性软化本构模型，采用Abaqus软件对界面层在应力传递中的作用与方式进行了数值分析。扫描电镜与透射电镜的观测表明：碳纤维增强木材陶瓷具有清晰的层状结构，且无定形碳与玻璃碳之间存在强界面结合。拉曼光谱的测试发现：加压烧结试件拉伸后的G'峰向低波数的位移更大，证明加压烧结能够改善玻璃碳与碳纤维之间界面的结合强度，数值分析显示：在受力过程中，界面层对碳纤维与基体材料之间的应力传递起着重要作用，同时，随着界面层强度与厚度的增加，其所能承受的载荷增大，传递给基体材料的等效应力也随之增加。
关键词：层状木材陶瓷：碳纤维增强：界面结构：应力分析中图分类号：TB39文献标识码：A
InterfaceStructureand Stress Analysis of CarbonFiberReinforced Laminated
Woodceramics
SUN De-Lin, HAO Xiao-Feng, HONG Lu, TANG Zhi-Hong,ZHANG Shao-Ming
(College of Fumiture and Art Design, Central South University of Forestry and Technology, Changsha 410004, China)
Abstract: To study the interface structure and loading conditions of fiber reinforced woodceramics composite, a laminated woodceramics were prepared by using liquification wood, carbon power and carbon fiber. Scanning elec tron microscope (SEM) and a high-revolution transmission electron microscope (HRTEM) were employed to ob-serve the basic structure and interface, and a micro-raman spectrometer (MRS) was used to detect the G' band shifts of stretch sample to judge the situation of interface bond. Meanwhile, the function and way of interface layer in the process of stress transfer were numerical analyzed by using Abaqus based on bilinear softening constitutive mode The observation of SEM and HRTEM indicates the carbon fiber reinforced woodceramics presents a clear laminated structure, of which has a strong interface bonding between amorphous carbon and glassy carbon. The test of MRS show that the G' band of pressure sintering specimen shifts to low wavenumber at high extent, which proves that pressure sintering can improve the interface bonding strength between glassy carbon and carbon fiber. The numeri-cal analysis shows that the interface layer plays an important role in the stress transfer between carbon fiber and matrix material in the loading process. As the intension and thickness of interface layer increase, the loading and the equivalent stress transfer to matrix material increases.
Key words: laminated woodceramics; carbon fiber reinforced; interface structure; stress analysis 收稿日期：2016-1-25；收到修改稿日期：2016-03-24
基金项目：国家自然科学基金(31270611)NationalNatural ScienceFoundation of China(31270611)
作者简介：孙德林(1966-)，男，教授.E-mail:sdlszy163.com 万方数据