Transverse microstructure generation method of unidirectional long fiber reinforced composite

A technology for enhancing composite materials and microstructures, which is applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve problems such as pores and random distribution of fibers that are not considered

Active Publication Date: 2019-01-11
SOUTHEAST UNIV
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Problems solved by technology

However, during the material manufacturing process, the random distribution of fibers and the existence of pores will result. Most of the existing transverse microstructures only consider the random distribution of fibers and do not consider the existence of pores.

Method used

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  • Transverse microstructure generation method of unidirectional long fiber reinforced composite
  • Transverse microstructure generation method of unidirectional long fiber reinforced composite
  • Transverse microstructure generation method of unidirectional long fiber reinforced composite

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Embodiment Construction

[0028] The technical solutions of the present invention will be described in detail below, but the protection scope of the present invention is not limited to the embodiments.

[0029] A method for generating transverse microstructures of unidirectional long fiber reinforced composites, such as figure 1 As shown, the specific operation is as follows:

[0030] Step (1) Determine the initial position of the fiber within the RVE window:

[0031] 1.1) Determine the initial parameters of the RVE model: the initial parameters of the model include the RVE window (square or rectangle on the x-y plane of the coordinate axis, choose a square here), side length s, fiber volume content V f , fiber radius r, complete fiber number n and pore volume content V v , where s=37.6μm, V f =50%, r=5μm, n=36, V v = 1%;

[0032] 1.2) Generate the coordinate position of the periodic distribution of fibers within the RVE window: select a unit cell model that uses the square distribution of fibers,...

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Abstract

The invention provides a transverse microstructure generation method of a unidirectional long fiber reinforced composite material. In the target area where the RVE model needs to be generated, the initial parameters of the RVE model are determined, the regularly distributed fiber position is taken as the initial fiber position, combined with the intersection algorithm between adjacent rows or columns, under the condition that the periodicity of the fiber at the boundary is ensured, a random perturbation method is utilized to generate the RVE with periodic repetitive fiber random distribution.Based on the obtained random fiber position coordinates, the initial position of the micro-pores is determined, and the size and shape of the pores are determined randomly. Finally, the transverse microscopic model of the composites considering the random distribution of the fiber and the micro-pores is established by random perturbation of the position of the pores. The invention considers the reconstruction technology of the transverse microstructure of the unidirectional long fiber composite material, adopts the random perturbation method for the random distribution of the fibers and the pores, and can effectively and efficiently establish the transverse RVE model considering the random distribution of the fibers and the pores.

Description

technical field [0001] The invention relates to a composite material, in particular to a method for generating a lateral microstructure of the composite material. Background technique [0002] Due to the advantages of high specific strength, high specific rigidity, and strong design, composite laminates are now widely used in aerospace, automobile, civil engineering and other industries. Since unidirectional composite panels are part of laminated panels, the deformation and damage assessment of unidirectional long fiber composite structures under external loads has become a research focus in the field of composite materials. [0003] The transverse mechanical properties of composite materials are the weakest direction in the overall performance of materials. Using numerical analysis methods to predict the transverse properties of composite materials can reduce the number of tests and save costs. It is used to analyze different factors, such as the internal structure of mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20Y02T90/00
Inventor 费庆国王猛李彦斌张培伟郭飞于静巍
Owner SOUTHEAST UNIV
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