Analytical Investigation and Comparative Assessment of Interphase Influence on Elastic Behavior of Fiber Reinforced Composites
Analytical Investigation and Comparative Assessment of Interphase Influence on Elastic Behavior of Fiber Reinforced Composites
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DOI：
10.1177/0731684408100268
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发表时间：
2010-03
影响因子：
3.1
通讯作者：
P. Gohil;A. A. Shaikh-A.
中科院分区：
文献类型：
--
作者：
P. Gohil;A. A. Shaikh-A.
界面相互作用和界面相在所有纤维增强复合材料中起着关键作用。但是，必须明确区分界面和界面。当界面厚度减小到零时，界面变为界面。在大多数可用的微力学模型中，界面被认为是完美的（无界面）。然而，在实际的复合材料中很难满足这样的条件。使用DSC或使用SEM或其他一些复杂的仪器技术识别间相区域可以找到间相的体积，因为它是在复合材料的两个主相之间产生的区域。所有这些技术都需要特殊的技术技能。本研究尝试用扫描电镜来识别纤维基复合材料中相间区是否存在。并决定将复合材料视为三相RVE，建立相间体积分数和厚度方程。建立了考虑软、硬两相参数的间相体积分数方程。将纤维增强复合材料的纵向和横向弹性行为与已有的实验数据和已发表的文献模型进行了比较，结果吻合较好。
Interfacial interactions and interphases play a key role in all fiber reinforced composites. However, a clear distinction must be made between interface and interphase. Interphase becomes interface if its thickness decreases to zero. In most of the available micromechanical models the interface is considered perfect (no interphase). However, such a condition is hardly fulfilled in real composites. It is possible to find the volume of interphase by using DSC or identification of interphase region using SEM or some other sophisticated instrument techniques as it is a region created between the two main phase of a composite. All these techniques require special technical skill. In the present study attempt is made to identify the existence of the interphase region in fiber matrix composites using SEM. It was also decided to develop an equation for volume fraction and thickness of interphase by considering the composite as three-phase RVE. Developed equations of interphase volume fraction was used by considering the soft and stiff interphase parameters. Comparisons were made to study elastic behavior of fiber reinforced composites in longitudinal and transverse directions with available experimental data and published model in the literature and they are in good agreement.