Computer pattern recognition method for composite material microstructure

Abstract

The invention discloses a computer pattern recognition method for the composite material microstructure. The computer pattern recognition method includes the following steps that pictures of the 2.5-dimensional composite material microstructure are obtained; matrix areas are recognized with the threshold segmentation technology; all the matrix areas serve as twisty quadrilateral structures to be treated, and four boundaries of each matrix area are recognized and marked; the matrix areas matched with the left matrix areas are found; the complete boundaries of warp yarn areas are obtained in a spline fitting mode; in all pairs of symmetrical matrix areas, the areas defined by the boundaries of the left matrix areas, the boundaries of the right matrix areas, upper warp yarn boundary lines and lower warp yarn boundary lines are weft yarn areas, and recognition of components is completed; all the recognized pictures are stacked to build a three-dimensional model of the 2.5-dimensional inside microstructure. According to the computer pattern recognition method, manual intervention is avoided, the three-dimensional model of the composite material microstructure can be built, and warp yarns, weft yarns and matrixes can be automatically recognized by a computer.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular refers to a method for computer graphic recognition and three-dimensional model modeling of a 2.5-dimensional composite material mesostructure. Background technique [0002] 2.5D fiber-reinforced composite materials have the characteristics of high specific stiffness, specific strength, and good anti-delamination properties, and are widely used in military, energy, transportation and other industries. The identification of mesostructure is an important link in the structural design of 2.5D composite materials. The mesoscopic identification process generally uses non-destructive testing methods to obtain digital images of the mesoscopic structure of materials, and then identifies various component structures through computer technology. Based on it, the mesoscopic mechanical model of the material can be established, the mechanical properties and damage calculation of...

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Problems solved by technology

[0006] Aiming at the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a computer graphic recognition method for the mesostructure of composite materials, to solve the problem that it is very difficult to identify the mesostructure of composite materials in the prior art. The method of the present invention Without manual intervention, a 3D model of the mesostructure of composite materials can be established, and the warp, weft and matrix can be automatically identified by the computer

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