Modeling Of Interfacial Debonding-inclosure And Interfacial Fatigue In Particle Reinforced Composites

Composite materials, for their attractive behaviors, have been utilized more and more widely in many important industry fields, such as aerospace, automobile, military production, nuclear energy and so on. For particulate reinforced composites, the material properties, both mechanical and thermal, can be improved by the particulate inclusions. On the other hand, the strength of fracture and fatigue will be decreased at the same time. These two effects, both the positive and negative, reinforce the complexity in the application the particulate reinforced composites. And the key of solution the problem is that the build model could exactly analyze and simulate the two effects by the spatial distribution of those second phase inclusions. Only the build model is efficiently reasonable, we can make clear varieties of mechanical properties of the particulate reinforced composites and accelerate their development more deeply. The main contributions in this paper can be listed as follows:1. Based on VCFEM that can describe the matrix-inclusion interfacial damage of particulate reinforced composites, a scheme can calculate those both interfacial damage and closing is proposed. Their establishing function and vector-matrix is same and there are two differences between them:one is that when interfacial closing is saw about, grid refit that include the number of total interfacial node, numbering and increase-or-decrease of crack node will vary preparing to think the interfacial damage only; the other is that the crack rule will be amended that the interface where the cracked side of matrix-inclusion contact again won't support pull. According to these two differences, the given subroutine will trace the interfacial damage and closing.2. Combining the VCFEM with FEM software, the matrix-inclusion interfacial fatigue of particulate reinforced composites will be analyzed commonly. The main matter will be thought about in this section are two models:the one with no crack, the other with two interfacial cracks. Whether think about interfacial crack, VCFEM determine it. If crack appears on the interface, the built model by FEM software will include one. The stress distribution of FEM model loaded circle force will be taken into fatigue analysis.