Refined modeling simulation method for two-dimensional plain woven fiber reinforced composite material

Abstract

The invention belongs to the field of finite element simulation of fiber reinforced composite materials, and relates to a refined modeling simulation method of a two-dimensional plain woven fiber reinforced composite material. The method comprises the following steps: (1) simplifying the microstructure of the two-dimensional plain woven composite material; (2) acquiring RVE geometric parameters; (3) establishing a geometric model; (4) setting section attributes; (5) determining performance parameters of the fiber tows; (6) setting a material model; (7) defining a load condition and a boundarycondition; (8) contact setting; (9) setting a control card and submitting calculation; according to the invention, the mechanical response and failure process of the fiber and the matrix of the fiberreinforced composite material can be simulated in more detail to obtain the microcosmic processes of interface cracking, fiber matrix damage and the like of the fiber reinforced composite material; accurate reference bases are provided for related structural design, the actual experiment frequency of researchers is reduced, the development period is shortened, and meanwhile the design and development cost is reduced.

Description

technical field [0001] The invention belongs to the field of finite element simulation of fiber-reinforced composite materials, and relates to a refined modeling simulation method of fiber-reinforced composite materials. Background technique [0002] Compared with traditional metal structures, fiber reinforced composites (FRP) have excellent mechanical properties such as light weight, high specific stiffness, good impact resistance, and strong fatigue resistance. At present, they are widely used in national defense, aerospace, automobiles, etc. field. However, the process of damage and failure of fiber-reinforced composite materials is very complicated. In-depth study of the mechanical response, failure process and prediction of residual strength of the material has become the research focus of relevant personnel. [0003] In the research of fiber-reinforced composite materials, the traditional mechanical experiment method cannot observe the damage and failure process in de...

AI Technical Summary

Problems solved by technology

At the same time, fiber-reinforced composite materials present a mixed state of fibers, matrix (mostly resin materials) and interface phases on the microscopic level, and the microstructure is complex, so it is very difficult to model.

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