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人工晶体学报 ›› 2026, Vol. 55 ›› Issue (2): 291-300.DOI: 10.16553/j.cnki.issn1000-985x.2025.0207

• 研究论文 • 上一篇    下一篇

机器学习加速预测SiC纳米声子异质结的力学性能

杜伊凡1(), 刘劲松2, 姜萍3(), 任龙军3   

  1. 1.集美工业职业学院智能控制产业系,厦门 361022
    2.厦门信息学校智联机电部,厦门 361009
    3.皖江工学院马鞍山市汽车冲压模具先进设计工程技术研究中心,马鞍山 243031
  • 收稿日期:2025-09-24 出版日期:2026-02-20 发布日期:2026-03-06
  • 通信作者: 姜萍,讲师。E-mail:wt15008@163.com
  • 作者简介:杜依凡(1970—),男,福建省人,高级讲师。E-mail:du_yifan@qq.com
  • 基金资助:
    福建省职业教育研究项目(ZB2023037);马鞍山市工程技术研究中心开放基金(QMSG202504)

Machine Learning Accelerated Prediction of Mechanical Properties in SiC Nanophononic Heterostructures

DU Yifan1(), LIU Jingsong2, JIANG Ping3(), REN Longjun3   

  1. 1.Intelligent Control Industry Department,Jimei Polytechnic Vocational College,Xiamen 361022,China
    2.Intelligent Systems Electromechanical Department,Xiamen Information School,Xiamen 361009,China
    3.Ma’anshan Engineering Technology Research Center of Advanced Design for Automotive Stamping Dies,Wanjiang University of Technology,Ma’anshan 243031,China
  • Received:2025-09-24 Online:2026-02-20 Published:2026-03-06

摘要: 为系统研究温度与孔隙几何对SiC纳米声子异质结(NHs)力学性能的耦合影响,本研究采用分子动力学模拟结合随机森林机器学习方法,分析了在50~500 K温度范围内、具有不同矩形声子晶体孔径及长宽比、并分别沿armchair和zigzag晶向构建界面的SiC NHs在单轴拉伸下的断裂行为。结果表明:随着温度升高,SiC NHs的断裂强度与断裂应变分别下降20%~32%和26%~35%;矩形声子孔沿拉伸方向的孔长是控制断裂强度的主导几何参数,具有armchair界面的SiC NHs的断裂强度整体较zigzag界面的提高15%~20%,大孔径声子孔会显著加剧局部应力集中与热软化效应。基于分子动力学模拟数据构建的随机森林模型在SiC NHs断裂性能预测中具有较高精度(R2=0.99),计算效率比分子动力学拉伸模拟提升约600倍,可为SiC纳米器件中SiC NHs的可控制备与力学性能设计提供理论支撑与快速预测工具。

关键词: SiC纳米声子异质结; 力学性能; 分子动力学; 随机森林; 机器学习

Abstract: To systematically investigate the coupled effects of temperature and pore geometry on the mechanical properties of SiC nanophononic heterostructures (NHs),molecular dynamics simulations combined with a random forest machine learning method are employed to analyze the fracture behavior of SiC NHs under uniaxial tension in the temperature range from 50 K to 500 K. The models feature different pore sizes and aspect ratios of rectangular phononic crystal pores,with interfaces constructed along the armchair and zigzag crystal orientations. The results show that,as temperature increases,the fracture strength and fracture strain of SiC NHs decrease by 20%~32% and 26%~35%,respectively. The pore length of the rectangular phononic pores along the loading direction is identified as the dominant geometric parameter controlling the fracture strength. SiC NHs with armchair interfaces exhibit fracture strengths approximately 15%~20% higher than those with zigzag interfaces,and larger phononic pore sizes significantly intensify local stress concentration and thermal softening effects. The random forest model constructed based on molecular dynamics simulation data achieves high accuracy (R2=0.99) in predicting the fracture properties of SiC NHs,while its computational efficiency is about 600 times higher than that of molecular dynamics tensile simulations. This work provides theoretical support and a fast prediction tool for the controllable fabrication and mechanical performance design of SiC NHs in SiC nano-devices.

Key words: SiC NH; mechanical property; molecular dynamics; random forest; machine learning

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