Three-Dimensional Modeling of the Interphases in Fiber- Reinforced Composite Materials

研究了纤维增强复合材料中界面相或界面区的细观力学行为。基于弹性力学理论，建立了含基体、纤维和界面相的三维单胞模型，研究了界面裂纹对材料力学性能的影响。一个先进的三维边界元方法与薄体的能力，提供更准确的应力数据，特别是当界面裂纹的界面或附近。 该研究加深了对纤维增强复合材料界面微观力学性能的理解，并为先进复合材料的设计提供了一个强大的数值工具。

The micromechanical behavior of interphases or interfacial zones in fiber-reinforced composite materials is investigated. Three dimensional models based on elasticity theory are developed for a unit cell, which contains the matrix, fiber and interphase, with or without the presence of an interface crack. An advanced three-dimensional boundary element method with thin-body capabilities is employed which provides more accurate stress data in or near the interphase especially when interface cracks are present. The research enhances the understanding of the micromechanial properties of interphases in fiber reinforced composite materials and facilitate a robust numerical tool in the design of advanced composite materials.