Micro-Stress-Field of Lamellar Inclusion in Eutectic Composite Ceramic

Abstract

According to the interaction between lamellar inclusion and interphase, forth-phase model is suggested to determine the micro-stress-field distribution of three-phase cell in eutectic composite ceramic. On the basis of the volumetric average strain, the effective compliance tensor increment of eutectic composite ceramic is obtained. The remote stress boundary condition of the eutectic composite ceramic is accounted for getting the micro-stress-field of lamellar inclusion in eutectic composite ceramic. Analysis shows that the micro-stress-field of the lamellar inclusion in eutectic composite ceramic is associated with the stiffness and the volume fractions of each component in eutectic composite ceramic, the shape of interphase and lamellar inclusion. The-micro-stress field has apparent size effect: three direction stresses increase with the thickness of lamellar inclusion.

Research on interface slippage of fiber reinforced composite ceramics

“…And the local slip feature of the micro-interface between eutectic groups makes it have high fracture toughness [2]. Many literatures have analyzed micromechanics about the strong constraining characteristics of the nano-interface, such as the microscopic stress field of unidirectional jagged inclusion eutectics [3], the damage strain field of unidirectional parallel eutectics [4], and damage intensity model of composite ceramics with damaged eutectics [5] etc. In order to reveal the relationship between the mechanical properties and the microstructure of the composite ceramic whose main structure is triangular symmetrical eutectic, the influence which the local slip property of the micro-interface between eutectic clusters brings to the composite ceramic mechanical behavior must be further analyzed.…”