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

研究了纤维增强复合材料界面相或界面区的微观力学行为。基于弹性理论，建立了包含基体、纤维和界面的单元胞的三维模型，并讨论了是否存在界面裂纹。采用了一种先进的具有薄体能力的三维边界元方法，可以提供更精确的界面内或界面附近的应力数据，特别是当界面存在裂纹时。该研究提高了对纤维增强复合材料界面微观力学性能的认识，为先进复合材料的设计提供了可靠的数值工具。

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.