Finite element analysis of internal stress in short fiber rubber composite

The distribution and transfer of internal stress in short fiber rubber composite (SFRC) were researched by finite element analysis. The results showed that the interface shear stress in the end of short fiber and the tensile stress in the middle of short fiber were both highest, a part of tensile stress in short fiber was transfered by the end of short fiber. The higher the volume fraction of short fiber, the more serious shear stress concentration in the end of short fiber; the bigger the L/D of short fiber the higher the tensile stress of short fiber, but the trend of increasing reduced gradually. With the increase of the modulus of matrix, the interface shear stress concentration and the tensile stress concentration of fiber both decreased, but their absolute values still increased.