长石质陶瓷磨损研究及有限元数值模拟  

Wear Research and Finite Element Analysis of Feldspar Ceramics

作　　者：王萍萍 孟令磊 朱亚 陈建钧[2] WANG Pingping;MENG Linglei;ZHU Ya;CHEN Jianjun(Department of Stomatology,Xuhui District Dahua Hospital,Shanghai 200237,China;School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]徐汇区大华医院口腔科,上海200237 [2]华东理工大学机械与动力工程学院,上海200237

出　　处：《华东理工大学学报（自然科学版）》2024年第2期310-318,共9页Journal of East China University of Science and Technology

基　　金：上海市徐汇区科委项目(SHXH201911)。

摘　　要：利用高速环-块摩擦磨损实验机在10、20、30、40 N载荷下对Sirona CEREC Blocks长石质瓷块进行3.5×105周次磨损实验,得到磨损质量、磨损速率等参数与载荷、磨损周次的变化关系,根据所得变化关系将长石质陶瓷的磨损过程分为3个阶段,观察了各阶段的磨损表面形貌。对Archard磨损模型进行修正改进并通过ABAQUS中UMESHMOTION子程序开展有限元仿真研究。在ALE(Arbitrary Lagrangian-Eulerian)自适应网格区域选取两种节点路径,于3.0×10^(5)周次磨损工况下对4种不同载荷下的磨损深度进行仿真分析,并与实验值对比验证,结果表明10 N载荷工况下磨损深度的最大误差为12.18%,30 N载荷工况下磨损深度的最小误差为8.64%。Feldspar ceramic materials are widely used as dental ceramic materials in the field of dental prosthetics.Studying their wear mechanisms is of great significance for the evaluation and prediction of dental ceramic life.This paper studies the wear mechanisms of feldspar ceramic materials from the aspects of wear performance experiments and finite element analysis.The high speed ring block friction and wear tester were used to conduct 3.5×105 times wear tests on the Sirona CEREC Blocks feldspathic ceramic block under the load of 10,20,30 N and 40 N.The changes of wear quality,wear rate,etc.with respect to load and wear times were obtained.According to the change curve,the wear process of feldspathic ceramics was divided into three stages and the wear surface morphology of each stage was observed.The Archard wear model was modified and improved,and based on this,the finite element simulation research was carried out through the UMESHMOTION subroutine in ABAQUS.Two node paths were selected to conduct simulation analysis on the adaptive mesh area of ALE for wear under four load sizes and 3.0×10^(5)wear cycles.Compared with the experimental wear depths,the maximum error under 10 N load was 12.18%,and the minimum error under 30 N load was 8.64%.

关 键 词：牙齿修复 长石质陶瓷 磨损实验 磨损模型 有限元分析 

分 类 号：TH140.7[一般工业技术—材料科学与工程] R783.3[机械工程—机械制造及自动化]