摘要
本文作者通过数值模拟的方法 ,考察了纤维在基体中埋深长度及基体对纤维的包裹厚度等几何因素对纤维拔出实验中界面应力分布和断裂力学性能的影响。在理想界面 (纤维与基体间完好粘结 )假设下 ,纤维与基体间界面剪应力与正应力沿纤维轴向的分布进行了定量研究 ;在忽略温度残余应力、裂缝间摩擦力和材料非线性效应的条件下 ,对开裂全过程中系统能量释放率的变化规律进行了数值跟踪。研究表明
Using the numerical simulation technique, the authors study the effect of the specimen size on the stress distribution and fracture properties of the interface between the fiber and matrix for the fiber pull-out test. The effects of the embedded length of the fiber in the matrix and the wrapped thickness of the matrix around the fiber are considered. On the assumption of the perfect interface of fiber and matrix, the numerical analysis for the interfacial shear stress and normal stress of the test specimen with different dimensions is performed. For the whole process of interfacial crack growth, the energy release rate is calculated. All materials are assumed to be linearly elastic solid. It is shown that the size of the test specimen affects dramatically the distribution of stresses and the fracture properties of the interface.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2002年第5期84-88,共5页
Acta Materiae Compositae Sinica
