DENG Jianxin ,AI Xing ,ZHAO Jun

(Department of Mechanical Engineering, Shandong University of Technology)

Abstract : Finite element method was used to analyze the stresses in the whisker - matrix interface of Al₂O₃／SiO₂ ceramic composite when whisker pullout was occurred, the stresses distribution was also obtained. Based on the calculation, the fractrue model of the whisker - matrix interface was studied. Results showed that the debonding behavior at the whisker - matrix- interface depended on the stresses and its distribution. For the bridged whiskers the debonding was found to occur owing to the larger radial tensile stress. When the crack front arrived the whiskers, the debonding was expected to be caused by the larger shearing stress.

Keywords:  SiC whisker, ceramic composite, pullout, finite element method