纤维拔出过程中纤维净距对基体受力影响的有限元分析

Finite element analysis of the influence on the matrix under different space condition in fiber pull-out experiment

通过有限元软件ANSYS建立了不同纤维净距下纤维砼的有限元模型,模拟了在不同净距条件下两根纤维同时拔出时基体的受力情况,计算结果表明:纤维埋入基体的两端有剪应力集中的情况;在纤维净距较小时存在应力叠加现象,而当纤维净距增大到28 mm时,每根纤维周围基体的受力状态与单根纤维时基体受力状态基本相同。

The FEM model of fibre pull-out tests with different clear distance was created by using ANSYS,simulate the mechanic response of the matrix which embossed two fibers with different clear distance.The research shows that peak shear stress occurs at the interfacial end;when the distance between two fibers is small,there exsit stress superposition phenomenon.However,when the distance increase to 24mm,the impact of each fiber on matrix are independent.