粗糙齿面接触疲劳性能的晶体塑性有限元分析  

Crystal plasticity finite element analysis of contact fatigue performance of rough tooth surface

作　　者：周炜 何鑫 肖罡 唐进元[3] ZHOU Wei;HE Xin;XIAO Gang;TANG Jin-yuan(Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material,Hunan University of Science and Technology,Xiangtan 411201,China;Jiangxi Copper Technology Research Institute Co.,Ltd.,Nanchang 330096,China;College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China)

机构地区：[1]湖南科技大学难加工材料高效精密加工湖南省重点实验室,湖南湘潭411201 [2]江西铜业技术研究院有限公司,江西南昌330096 [3]中南大学机电工程学院,湖南长沙410083

出　　处：《塑性工程学报》2025年第2期149-156,共8页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(52471055);江西省自然科学基金杰出青年基金资助项目(20224ACB218002);江西省高层次高技能领军人才培养工程资助项目;湖南省自然科学基金资助项目(2022JJ30019);广西大学省部共建特色金属材料与组合结构全寿命安全国家重点实验室开放基金资助项目(2022GXYSOF24)。

摘　　要：为探究表面粗糙度对齿轮接触疲劳强度作用的微观机制,基于晶体塑性理论建立了粗糙齿面接触疲劳分析的有限元模型,计算了不同粗糙度下齿轮的次表层应力场,采用统计学手段分析了粗糙度参数与次表层最大Mises应力的相关性,并从滑移系启动的角度对粗糙度作用机制进行了讨论。结果表明,对齿轮次表层最大Mises应力起主导作用的粗糙度参数为Sf、Rdq和Rp,其影响强度依次Sf>Rdq>Rp,它们共同决定了最大Mises应力的大小及其分散性;Sf、Rdq和Rp越大,齿轮次表层最大Mises应力越大,微观层面上滑移系启动数量越多,滑移程度越高,导致齿轮接触疲劳损伤越快,疲劳寿命越短。To clarify the micro mechanism of the effect of surface roughness on contact fatigue strength of gear,the finite element model for contact fatigue analysis of rough tooth surface was established based on crystal plasticity theory.The subsurface layer stress fields under different roughnesses were calculated.The correlation between roughness parameters and the maximum Mises stress of subsurface layer was analyzed using statistical method.The effect mechanism of roughness was discussed from the perspective of slip system activation.The results show that the roughness parameters that dominate the maximum Mises stress of subsurface layer of gear are Sf,Rdq and Rp,and the influence intensity is Sf>Rdq>Rp in order,and the magnitude and the dispersivity of the maximum Mises stress are determined by all the three parameters together,the larger Sf,Rdq and Rp,the greater the maximum Mises stress of subsurface layer of gear,the more the slip systems activated at micro level,and the higher the sliding degree,and then the faster the contact fatigue damage of gear and the shorter the fatigue life.

关 键 词：齿轮 粗糙度 接触疲劳 晶体塑性 分散性 

分 类 号：TH114[机械工程—机械设计及理论]