材料期刊网

MECHANICAL-BEHAVIOR OF A CROSS-WEAVE CERAMIC MATRIX COMPOSITE .1. TENSILE AND COMPRESSIVE LOADING

Journal of Materials Science

The deformation and fracture processes of a cross-weave carbon fibre/SiC composite prepared by a chemical vapour deposition process has been explored by interrupted-loading tests and SEM examination of cracking and fracture processes. The tensile stress-strain curves show non-linear behaviour associated with progressive matrix cracking and spalling, and the occasional fracture of a fibre. Re-loading curves and compressive stress-strain curves show linear behaviour. The fracture process does not involve cracking by a single dominant crack but occurs by the development of multiple damage sites operating around the transverse fractures of groups of four to eight fibres followed by longitudinal cracking at their fibre-matrix interfaces and temporary arrest of the cracks, until specimen failure occurs and there is massive fibre debonding and pull-out.

关键词: fiber

Interfacial Debonding of FRC Under Cyclic Loading

Q.J. Zhu , Y.H. Chen , J. Chen

金属学报(英文版)

With the increasingly use of FRC (fiber-reinforced composite) in urban lifelines, mechanical properties investigation is very important for disaster resistance, especially the investigation of fatigue properties. Based on the shear-lag model, an usual composite model under cyclic loading is established. According to the Paris formula, the relationship between interfacial fatigue parameters and the number of cycles is obtained under the cyclic loading. Interfacial fatigue properties of this model and the growth of the interfacial fatigue crack are analyzed. And the Poisson ratio is considered also.

关键词: interfacial debonding , null , null , null , null

Theoretical Prediction of Strength of Composite with Fractal-tree Structure Fibers

Shaoyun FU Wuming LIU Benlian ZHOU Chiwei LUNG International Centre for Materials Physics , Institute of Metal Research , Academia Sinica , Shenyang , 110015 , China

材料科学技术（英）

Theoretically;the strength of composite with branched fibers is predicted to be greater than that of composite with plain fibers.The effects of the branching angle of the fiber,and the snubbing friction between the fiber and the matrix at the fiber branching point and the branching step's number of the fiber on the strength of the composite with branched fibers have been studied.It has been shown that the strength of the composite increases with branching angle,the snubbing friction and the branching step's number.

关键词: composite , null , null

Some Further Considerations about the Theory of Elastic Stress Transfer from Partially Embedded Axially Loaded Fiber to Matrix

Shaoyun FU Benlian ZHOU Chiwei LUNG International Center for Materials Physics , Institute of Metal Research , Academia Sinica , Shenyang 110015 , China

材料科学技术（英）

In this paper the elastic stress transfer from the fiber to the matrix is analysed for fiber-reinforced composites when the fiber is loaded axially.The dependence of the elastic stress transfer on the as- pect ratio of the fiber,the volume fraction of the fiber,the fiber-to-matrix elastic modulus ratio and the Poisson's ratio of the fiber and the matrix has been shown in detail.

关键词: elastic stress transfer , null , null

Biomimetic Design and Test of Composite Materials

Benlian ZHOU International Centre for Materials Physics , Institute of Metal Research , Academia Sinica , Shenyang , 110015 , China

材料科学技术（英）

A series of superior properties will make composites the most important structural materials in the next century.But they are difficult to design owing to the complexity of structure and processing. Biomaterials had been naturally selected and evolved for millions of years,a great variety of their ra- tional composite structures could be taken as our reference in the biomimetic design of composite materials.There are many difficult problems in the current study on composite materials such as: brittleness of continuous fibers and difficulties in interface design;easy pull-out of short fibers from matrix causing failure in reinforcing;being less easy in selecting the aspect ratio of whiskers and dif- ficulties in finding the way of toughening composites of ceramic matrices as well as the way of heal- ing inner damages.After describing the distinct composite features,the functional adaptability and self-healing ability of biomaterials,several examples o.f biomimetic design of composite materials have been listed in this paper:the optimum design of composites simulating bamboo structure;the fine structure of bamboo fibers;the dumb-bell model simulating animal bone;the model on the pull-out of fiber with fractal-tree structure and some tentative works on the healing of inner damage in composite materials The methodology of biomimetic design and its future have been given at the ast part of this paper.

关键词: composite material , null , null

高通量醋酸纤维素复合膜的制备及性能测试

王铭 , 赵晓燕 , 刘远 , 纪俊玲

高分子材料科学与工程

以醋酸纤维素(CA)为膜阻隔层,聚羟基丁酸/戊酸酯共聚物(PHBV)作为膜支撑层,利用静电纺丝法制备出复合膜.研究了醋酸纤维素质量分数、溶剂配比、电压,以及CA与PHBV复合比(体积比)对纤维形态及复合膜性能的影响,并通过扫描电镜表征了CA纤维膜的表面形貌.研究结果表明,当CA的质量分数为12％,溶剂丙酮与N,N-二甲基乙酰胺(DMAc)体积比为1/1,纺丝电压为14 kV时,CA纤维膜形态均匀,并呈现独特的双纤维直径交错结构.这种结构的膜材料有利于在提高水通量的同时,保持其较好的截留率.同时,当CA/PHBV的复合比为10/10时,复合膜的水通量能达到104数量级,截留率可以达到87％.

关键词: 静电纺 , 醋酸纤维素 , 聚羟基丁酸/戊酸酯共聚物 , 复合膜 , 纤维

纤维增韧钨基复合材料的研究现状

陈泓谕 , 罗来马 , 谭晓月 , 李萍 , 吴玉程

机械工程材料 doi:10.11973/jxgccl201508002

阐述了热核聚变反应中,面对等离子体材料对钨基复合材料的需求;主要介绍了纤维增韧钨基复合材料所用的碳纤维、玻璃纤维及金属纤维的主要特点及制备方法的优缺点,纤维强韧化机制,重点介绍了纤维增韧复合材料的制备工艺以及现阶段纤维增韧钨基复合材料的研究进展,并指出了今后的主要研究发展方向.

关键词: 纤维 , 强韧化 , 钨基复合材料 , 热核聚变

负载纳米MnO_2的吸附纤维室温下对甲醛的吸附分解

王涵 , 张华 , 张文华 , 任志龙 , 韩文清

高分子材料科学与工程

将纳米MnO2催化剂粉末负载到自制的含活性炭的腈氯纶纤维上,在室温下对甲醛进行吸附分解研究。借助扫描电子显微镜（SEM）进行显微结构观察,并分析了不同处理情况的负载纤维对甲醛的去除率。结果表明,研磨6h的MnO2粉末分散均匀,平均粒径可达300 nm,以平铺的形式均匀地负载于纤维上;研磨6h的MnO2粉末反应72h对甲醛的去除率达94.07%;二甲基甲酰胺（DMF）处理后的纤维对甲醛的去除率有所提高。

关键词: 二氧化锰 , 活性炭 , 纤维 , 甲醛 , 吸附

几种常用石棉检测方法的特点探究

陈政龙 , 胡宏伟 , 侯世忠 , 王春芬

材料开发与应用

石棉纤维一旦被人吸入肺中,会对人体造成较大危害,目前已被许多国家在船舶等行业禁止使用.石棉的检测方法有多种,目前较为常见的方法包括XRD、PLM、SEM、TEM等.本文通过对比4种方法对5组试样的检测结果,分析了每一种方法的特点.结果表明,每一种检测方法均具有各自的优势,但都无法适用于所有检测对象,检测机构应选择至少两种方法共同使用,以保证检测结论的准确性.

关键词: 石棉 , 检测方法 , 纤维 , 标准

复合材料层压板的变形:树脂基体、增强纤维与非对称正交铺层变形的关系

李艳亮 , 益小苏 , 唐邦铭 , 张子龙 , 安学锋

玻璃钢/复合材料 doi:10.3969/j.issn.1003-0999.2010.01.006

主要研究了复合材料层压板的变形情况.分别选取环氧、苯并噁嗪为基体,以特定型号的预浸料为材料,选取不对称铺层[0/0/90/90]条件,用ANSYS软件模拟复合材料层压板变形情况,与实际不对称层合板变形情况对比,分析树脂基体、增强纤维和非对称铺层与复合材料变形之间的关系.结果表明,不同的树脂基体材料和不同的铺层设计对非对称正交铺层复合材料层压板的变形情况有影响.

关键词: 复合材料层压板 , 变形 , 树脂基体 , 增强纤维 , 非对称正交铺层