摘要
该文基于热传学基本原理和热弹塑性理论,采用有限元方法,利用20CrMnTi钢的圆棒实验数据对渗碳齿轮的淬火冷却过程进行了数值模拟。为了模拟不同渗碳层厚度对残余应力的形成和分布的影响,编制了圆柱直齿轮模型以及渗碳层模型的创建,各种材料参数的输入,模型网格的划分,以及温度场和应力场求解整个过程的应用程序。通过调节参数,可以修改齿轮几何尺寸、渗碳层厚度等,可实现模拟渗碳齿轮淬火过程的参数化分析。根据数值分析结果,讨论了残余应力场对齿轮疲劳破坏的影响。
Based on heat transfer principles and thermal elastic-plastic theory, the quenching process simulation of carburized gears had been researched by the finite element method, which was used through the experimental data of 20CrMnTi standard specimen. In order to research the affection of different carburized layer thicknesses to the residual stress formation and distribution, several command streams had been programmed which included creating a model of a columned spur gear and a carburized layer model, the input parameters of various materials, model meshing and the throughout solution process of temperature and stress fields. By changing the different sizes of gears and the thicknesses of carburized layers, the parametric analysis could be realized to the quenching process simulation of the carburized gear. According to the results of numerical analysis, the affection about the residual stress field to gear fatigue damage had been discussed.
出处
《工程力学》
EI
CSCD
北大核心
2013年第1期407-412,共6页
Engineering Mechanics
基金
河北省自然科学基金项目(E2011203176)
关键词
齿轮
残余应力
渗碳
淬火
有限元法
gear
residual stress
carburize
quencher
finite element method
