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Unidirectional fiber composite material random structure generation method and system

A technology of composite materials and unidirectional fibers, applied in the field of materials, can solve problems such as characterization and reconstruction of random distribution of fibers

Inactive Publication Date: 2017-10-17
SHANGHAI JIAO TONG UNIV
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  • Abstract
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Problems solved by technology

[0003] Aiming at the defects that the existing technology cannot solve the characterization and reconstruction of random distribution of fibers in unidirectional fiber composite materials, the present invention proposes a method and system for generating random structures of unidirectional fiber composite materials, which can generate high volume fractions of RVE, fiber The distribution is sufficiently random that the generated RVE can be repeated periodically

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  • Unidirectional fiber composite material random structure generation method and system
  • Unidirectional fiber composite material random structure generation method and system
  • Unidirectional fiber composite material random structure generation method and system

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Embodiment Construction

[0029] Such as figure 1 As shown, the method for generating a unidirectional fiber material model in this embodiment includes the following steps:

[0030] 1) Generate initial state fibers within the RVE window.

[0031] 1.1) Determine the fiber parameters in the initial state. Fiber parameters include fiber radius r, target volume fraction V f , the minimum distance l between fiber boundaries min And the side length s of the square RVE window, where: s=50 μm, r=3.115 μm, l min = 0.2μm, V f = 65%.

[0032] 1.2) Generate fully densely packed fibers within the RVE window. In the square area of ​​the RVE window, a point is used as the center of the circle, and the radius is given to represent the circle of the fiber section. Since the RVE is assumed to be a straight line along the fiber direction, the volume fraction of the fiber is equal to the area fraction of all circles in the section. Put as many fibers as possible in the window that are completely densely arranged, a...

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Abstract

The invention discloses a unidirectional fiber composite material random structure generation method and system. The method comprises the steps of generating fibers in initial states in sequence in an RVE window and performing random disturbance to obtain fiber position information; and then performing periodic maintenance on the fibers in the RVE window and building an RVE three-dimensional model according to the fiber position information. According to the unidirectional fiber composite material random structure generation method and system disclosed by the invention, an RVE with high volume fraction can be generated; fiber distribution has sufficient randomness; and the generated RVE can be periodically repeated.

Description

technical field [0001] The invention relates to a technology in the field of materials, in particular to a method and system for generating a random structure of a unidirectional fiber composite material. Background technique [0002] Fiber-reinforced composites have the advantages of low density, high specific stiffness, high specific strength, and fatigue resistance, and have received more and more attention in industrial fields such as aviation and automobiles. The traditional method of analyzing the mechanical properties of composite materials based on experiments is costly and takes a long time. In recent years, numerical methods are an important means to quickly and accurately predict the mechanical properties of composite materials, among which computational mesomechanics combining mesomechanics and finite elements is an important direction for mechanical performance analysis and structural design of composite materials, and has been widely used. Based on the homogen...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06T17/00
CPCG06F30/00G06F2113/12G06T17/00
Inventor 朱平朱超刘钊陶威陈卫
Owner SHANGHAI JIAO TONG UNIV
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