多裂隙缺陷陶瓷轴承破坏机理研究  

Study on the Failure Mechanism of Ceramic Bearings with Multiple Crack Defects

作　　者：郭鹏翔 谷晓娇 朱振伟 GUO Pengxiang;GU Xiaojiao;ZHU Zhenwei(Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学机械工程学院,沈阳110159

出　　处：《沈阳理工大学学报》2025年第1期59-64,71,共7页Journal of Shenyang Ligong University

基　　金：辽宁省教育厅高等学校基本科研项目(JYTMS20230183)。

摘　　要：针对氮化硅陶瓷轴承的多裂隙缺陷会影响其力学性能及使用寿命的问题,提出了一种结合离散元(DEM)仿真和FISH语言程序的方法研究轴承缺陷。首先,采用DEM对轴承进行建模,通过力学校准实验测定相关力学性能参数,并通过试错法进行细观参数的标定,采用FISH语言程序建立氮化硅陶瓷轴承简化模型,并在模型中预制不同倾角和数量的平行裂隙缺陷;然后,通过模拟和数值计算,研究了裂纹在不同倾角和数量裂隙缺陷下的演化规律,同时结合裂纹周围的速度矢量场,分析了裂纹扩展的复杂性。实验结果揭示了受压下多裂隙缺陷的陶瓷材料损伤破坏机制,可为陶瓷轴承加工工艺、故障诊断、力学性能及使用寿命等研究提供理论指导。To address the issue that the multi-fracture defects of silicon nitride ceramic bearings will affect their mechanical properties and service life,a method combining discrete element method(DEM)simulation and FISH language program is proposed to study bearing defects.Firstly,the bearing is modeled by DEM,and the relevant mechanical performance parameters are determined by mechanical calibration experiments.The meso-parameters are calibrated by trial and error method.The simplified model of silicon nitride ceramic bearing is established by FISH language program,and parallel crack defects with different inclination angles and numbers are prefabricated in the model.Then,through simulation and numerical calculation,the evolution law of cracks under different inclination angles and number of crack defects is studied.At the same time,combined with the velocity vector field around the crack,the complexity of crack propagation is analyzed.The experimental results reveal the damage and failure mechanism of ceramic materials with multiple cracks under compression,and provide theoretical guidance for the processing technology,fault diagnosis,mechanical properties and service life of ceramic bearings.

关 键 词：氮化硅陶瓷轴承 离散元 多裂隙缺陷 破坏机理 

分 类 号：TH17[机械工程—机械制造及自动化]