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Composite material mechanics property evaluation method based on three-dimensional microcosmic crystal whisker composition

A technology for composite materials and whiskers, which is applied in the field of evaluation of mechanical properties of composite materials, and can solve problems such as the inability to realize three-dimensional zinc oxide whisker microscopic modeling

Inactive Publication Date: 2014-04-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for evaluating the mechanical properties of composite materials based on three-dimensional microscopic whiskers for the problem that the microscopic modeling of three-dimensional zinc oxide whiskers cannot be realized at present. The finite element model of composite materials composed of three-dimensional microscopic whiskers realizes the evaluation and optimization analysis of the basic mechanical properties of composite materials

Method used

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  • Composite material mechanics property evaluation method based on three-dimensional microcosmic crystal whisker composition
  • Composite material mechanics property evaluation method based on three-dimensional microcosmic crystal whisker composition
  • Composite material mechanics property evaluation method based on three-dimensional microcosmic crystal whisker composition

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Embodiment Construction

[0032] 1. According to the design requirements, give the length, width and height of the substrate, the length range of whisker stitches (maximum length and minimum length), the number n of whisker stitches and the number m of whiskers. Take the three-dimensional zinc oxide whisker as an example, four pins, n is 4.

[0033] 2. According to the Monte Carlo method, generate (4+6) random numbers, of which 6 random numbers are used as the coordinates of the center point of the whisker and the three Euler angles of the moving coordinate system where the whisker is located.

[0034] 3. Use the generated 4 random numbers to multiply the maximum length of the whisker pins to determine the length of the 4 whisker pins; use the generated 3 random numbers to multiply the side length of the substrate, as the origin of the dynamic coordinate system, and also the whisker The coordinates of the central node of . The coordinate system is created as follows:

[0035] Such as image 3 As sho...

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Abstract

The invention relates to a composite material mechanics property evaluation method based on three-dimensional microcosmic crystal whisker composition, and belongs to the field of composite material mechanics. According to the method, an Euler method and a Monte Carlo method are combined, and the mechanics property of reinforced composite materials can be pre-estimated based on a space random three-dimensional crystal whisker microcosmic configuration. The microstructure of crystal whiskers is comprehensively represented, the number of the crystal whiskers, the length of pins and the space random distribution status are fully considered, and the composite material mechanics property evaluation method has the advantages that crystal whisker unit generation efficiency is high, pre-estimated mechanics parameters are accurate, and the method is easy and convenient to use. Qualitative research can be provided for stiffness analysis and a stress distribution law of tetrapod-like crystal whisker reinforced polymers, and the method can be popularized and applied to the effective elastic property, mesomechanics analysis and microscopic damage failure numerical calculation of the randomly-distributed crystal whisker reinforced composite materials, and has obvious advantages compared with a two-dimensional method.

Description

technical field [0001] The invention relates to a method for evaluating the mechanical properties of a composite material based on three-dimensional microscopic whiskers, and belongs to the field of composite material mechanics. Background technique [0002] ZnO whisker-reinforced composite materials, as a kind of composite materials with integrated structure and function, have excellent stealth wave absorption and structural bearing capacity, and have broad application prospects in the fields of national defense, aerospace, aviation and transportation. At present, in evaluating the mechanical properties of zinc oxide reinforced composite materials, it mainly relies on the artificial preparation of zinc oxide reinforced composite materials, and tests the mechanical properties through equipment such as tensile testing machines and Hopkinson rods. However, when studying and optimizing the mechanical properties of ZnO-reinforced composites, it is necessary to investigate the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 荣吉利项大林王丹徐天富
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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