Quantitative Evaluation and Analysis of Interface Sliding Shear Stress using Stress Transfer at Real Contact Area of Interface in Composite Materials

利用复合材料界面真实接触面积的应力传递定量评估和分析界面滑动剪切应力

基本信息

批准号：
10450248
负责人：
KAGAWA Yutaka
金额：
$ 8.9万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

The properties of fiber-reinforced composites are strongly dependent on interface mechanical properties. Thus, understanding of interface mechanical properties becomes an important subject of recent researches. Among the interfacial mechanical properties shear frictional resistance is important. The attention of this study has been focused on a new approach for evaluation of interface shear frictional resistance by introducing a real contact area at a frictional sliding interface. The study involves (1) effect of interface roughness on shear frictional resistance, (2) quantitative analysis of interface shear frictional resistance using a real contact area approach, and (3) application of the real contact area for engineering composite.The effect of interface roughness on shear frictional resistance is examined using model composites. Fibers with a different surface roughness are incorporated into an epoxy matrix and the interface shear frictional resistance is evaluated by push-out and push-back tests. The result shows strong dependence of interface shear frictional resistance on the profile of surface roughness at frictional sliding interface. The real contact area analysis is introduced to evaluate shear frictional stress, and the analysis gives quantitative understanding of shear frictional resistance. The interface shear frictional resistance, τィイD2sィエD2, is expressed as τィイD2sィエD2=(AィイD2rィエD2/AィイD2aィエD2)・τィイD20ィエD2 where AィイD2rィエD2 and AィイD2aィエD2, respectively, are the real contact area and apparent contact area at frictional sliding interface, τィイD20ィエD2 is the intrinsic shear frictional resistance at the real contact area. This approach is applied to the evaluation of interface shear frictional resistance in AlィイD22ィエD2OィイD23ィエD2 fiber-reinforced AlィイD22ィエD2OィイD23ィエD2 matrix composite. The result indicates that the microstructural effect of the composite is successfully evaluated using a rear contact area approach.

纤维增强成分的特性在很大程度上取决于界面机械性能。这是对界面机械性能的理解成为最近研究的重要主题。在界面机械性能中，剪切摩擦电阻很重要。这项研究的注意力集中在一种新的方法上，以评估界面剪切摩擦抗性，通过在摩擦滑动界面引入真实的接触区域。该研究涉及（1）界面粗糙度对剪切摩擦抗性的影响，（2）使用实际接触面积方法对界面剪切摩擦抗性进行定量分析，（3）使用模型组合物检查界面粗糙度对剪切摩擦抗性的影响。具有不同表面粗糙度的纤维被掺入环氧基质中，并通过推出和推回后测试来评估界面剪切摩擦电阻。结果表明，界面剪切摩擦电阻对摩擦滑动界面处的表面粗糙度曲线的强烈依赖性。引入了实际接触区域分析以评估剪切摩擦应力，并且该分析对剪切摩擦抗性有定量理解。 The interface shear frictional resistance, τ D2sie D2, is expressed as τ D2sie D2=(Aii D2re D2/Aii D2a D2)・τ D20sie D2 where Aii D2re D2 and Aii D2ai D2, respectively, are the real contact area and apparent contact area at frictional sliding interface, τ D20i D2 is the intrinsic shear真实接触区域的摩擦阻力。这种方法应用于Al D22I D22OI D23I D2 D2纤维增强AL D22I D23I D23I D23I D2 d2矩阵复合材料中界面剪切摩擦电阻的评估。结果表明，使用后接触区方法成功评估了复合材料的微观结构效应。