二维编织C/SiC复合材料板疲劳损伤分析

To explore the basic laws of composite damage, first, based on damage mechanics, combined with Tsai-Hill criterion of strength, a damage evolution equation that can characterize the damage anisotropy of 2D braided C/SiC composites was proposed.Second, a damage simulation program considered material stiffness reduction depend on the damage degree, as an add-on function, was developed and inserted in the commercial finite element software ANSYS environment. Third, the damage evolution of the 2D braided C/SiC composite plate model was simulated, and the result shows stress and damage degree have coupling effects on the element damage during the damage process. Finally, the form of damage evolution equation is discussed and improved, and the anisotropic characteristics of damage evolution under the material property and the action of damage driving force is revealed by analog computation, indicating that the material anisotropy damage is the inevitable result of its material properties and loaded form.