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Multi-scale simulation method for mechanical behaviors of multi-phase composite material

A technology of composite materials and simulation methods, which is applied in the field of computer simulation analysis describing the mechanical behavior of multiphase composite materials, and can solve problems affecting the mechanical behavior and performance of materials

Active Publication Date: 2019-09-06
BEIJING UNIV OF TECH
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  • Application Information

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Problems solved by technology

Furthermore, the interaction between thermal stress and applied stress will greatly affect the mechanical behavior and performance of materials during service

Method used

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  • Multi-scale simulation method for mechanical behaviors of multi-phase composite material
  • Multi-scale simulation method for mechanical behaviors of multi-phase composite material
  • Multi-scale simulation method for mechanical behaviors of multi-phase composite material

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Experimental program
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Effect test

Embodiment 1

[0082] Obtain WC-Co image stacks through focused ion beam experiments, and binarize the images to obtain tissue images that can be used to build finite element geometric models, such as figure 2 shown. Avizo software was used for image processing to obtain the WC-Co three-dimensional finite element simulation geometric model of the real microstructure. ),Such as image 3 shown.

[0083] Through first-principles calculations, the Young's modulus, bulk modulus, shear modulus, Poisson's ratio and volume-energy relationship of metallic phase Co and ceramic phase WC in WC-Co composites were obtained at 0K. The volume-energy relationship is as Figure 4 shown.

[0084] E(GPa) B (GPa) G (GPa) υ WC 679.6 378.0 283.1 0.200 co 276.1 205.6 108.2 0.276

[0085] Using the Young's modulus, bulk modulus, shear modulus, Poisson's ratio and volume-energy relationship data at 0K calculated by first principles, the metal phase Co and ceramic phase WC...

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Abstract

The invention discloses a multi-scale simulation method for mechanical behaviors of a multi-phase composite material, and belongs to the field of multidisciplinary intersection of computational material science, analog simulation, high-throughput calculation and the like. Various physical property parameters needed by finite element simulation of the macroscopic scale can be obtained through calculation of the first principle of the nanoscopic scale, molecular dynamics simulation of the microcosmic scale and thermodynamic calculation of the mesoscopic scale, and the physical property parameters comprise elastic-plastic physical parameters of all phases in the composite material at different temperatures and different grain sizes and the like. A real material tissue structure is obtained byutilizing a focused ion beam experiment and image processing introduction. Through parameter coupling and parameter transmission among scale calculation results and combination with the structure ofthe material, mechanical behaviors such as stress-strain relationship, stress distribution and evolution and plastic deformation of the multi-phase composite material under complex stress and different temperatures can be simulated.

Description

technical field [0001] The invention belongs to the interdisciplinary fields of computational materials science, simulation, high-throughput calculation, etc., and specifically relates to a computer simulation analysis method suitable for describing the mechanical behavior of multi-phase composite materials based on the real organizational structure of materials. Background technique [0002] Under the leadership of the revolutionary thinking of the "Materials Genome Initiative (MGI)", materials computing plays an increasingly important role in guiding the design and development of new materials, which can provide accurate guidance for the design and development of new materials and effectively change the traditional materials design and development. The "trial and error" process greatly improves the efficiency of new material research and development, thereby effectively promoting the development of high-performance new materials and the rapid development of related advanced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/06G06F2111/10G06F2111/14G06F2113/26G16C10/00G16C60/00G16C20/30G16C20/80
Inventor 宋晓艳吕皓李亚楠唐法威
Owner BEIJING UNIV OF TECH
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