毫米级碳化硼颗粒增强核辐射屏蔽材料的力学性能预测

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关键词：毫米级 B4C 颗粒；核辐射屏蔽；代表性体元模型；力学性能预测中图分类号：TB33文献标志码：ADOI：10.7652/xjtuxb202511015 文章编号：0253-987X（2025）11-0155-09

Abstract： To address the limitations of existing prediction models in evaluating the mechanical properties of millimeter-level B4C particle-reinforced metal matrix nuclear radiation shielding materials with integrated neutron and gamma radiation shielding performance，a novel mechanical property prediction model combining finite element simulation software and self-programming is proposed. First， the LiveLinkTM for MATLAB interface is utilized to integrate the finite element software COMSOL Multiphysics with self-programming in MATLAB， establishing a GRM stochastic RVE model. Key simulation parameters including model dimensions and mesh sizes are determined through computational analysis. Subsequently， the model’s validity is verified through comparison with literature data. Finally，the effects of B4C particle content， shape，and size on the composite material's mechanical properties are systematically investigated via simulation. Results demonstrate that when the B4C particles are ideally bonded with the matrix at a radius of 0. 20cm and a volume fraction of 30% ，the composite material’s yield strength increases by 25.60% and 21.00% compared to boron steels containing 1.80% and 1.65% （204号 boron，respectively. Within the millimeter-level particle size range，variations in B4C particle shape and size affect the composite material’s elastic modulus and yield strength by no more than （20号 3.28% . The proposed prediction model provides valuable guidance for multi-property optimization design of millimeter-level B4C particle-reinforced nuclear radiation shielding composite materials.

Keywords： millimeter-level B4C particles; nuclear radiation shielding； representative volume element models;mechanical property prediction

核科学与技术在国家经济发展，如能源、环境和健康等领域中的作用日益显著，与之密切相关的核辐射防护也越来越受到重视。（剩余14087字）