Simulation Of Particle Reinforced Composite Materials Damage Mechanism In Macro-and Meso-Scales

Particle reinforced composite material is a new kind of composite material which has a very good mechanical properties, and it have been widely used in aerospace, mechanical manufacturing, optical, electronic and so on. The mechanical property of such materials is superior than the substrate material as the combination of the reinforcements which could reduce the properties of fatigue fracture at the same time. A mount of experimental research and numerical simulation works have been done by quantities researchers all over the world as the increasing application of such particle reinforced composite materials in recent years. As the complexity in microstructure of particles mixed materials, a lot of numerical simulation research could not reach balance between accurately describe of the microstructure and the stress-strain responses of macroscopically. There four parts in this article:1) A new method has been developed that could numerical simulate particle reinforced composite materials which is constructed by microscopic structure in both macro scale and micro scale according to the advantages of averaging method in discrete scale and the finite element method.2) Improved the algorithm flowchart of the original program which based on the idea of multi scale discretization. Call the self-test modules of dangerous area to discrete the whole components into micro model scale and macro model scale after displacement solution in macro scale by original program. Subprograms which generated from Voronoi unit have been called in the dangerous area to generate tiny mesh and calculate. The stress and stain response of the whole components will be get by the coupling of final computing result above and the computing result of macro element.3) A developed Fortran program has been written dependently to achieve the auto-test of dangerous area. Stress and strain has been selected as the threshold of the self-test element. The safe factor is also be set up here to insure the reliability of identification of dangerous area by manual.4) Relevant Fortran program has been written here to achieve the automatic generation of Voronoi mesh in dangerous area.5) The improved programs have a better adaptability to the components that have complex curved edges by introducing triangular elements to original program. This creates conditions for the simulations in both macro scale and micro scale of industrial parts in the future.