基于微动接触力学的柱-平板结构疲劳寿命研究  

Research on fatigue life of column-plate structures based on micro contact mechanics

作　　者：陈威 王兴东[1] 曹凯 李小白 张弘 李伟 CHEN Wei;WANG Xingdong;CAO Kai;LI Xiaobai;ZHANG Hong;LI Wei(Key Laboratory of Metallurgical Equipment and Control Technology,Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Wuhan Iron&Steel Co.,Ltd.,Hot Rolling Mill,Wuhan 430081,Hubei,China)

机构地区：[1]武汉科技大学冶金装备及其控制教育部重点实验室,湖北武汉430081 [2]武汉钢铁有限公司热轧厂,湖北武汉430081

出　　处：《农业装备与车辆工程》2024年第7期90-95,共6页Agricultural Equipment & Vehicle Engineering

基　　金：国家自然科学基金面上项目“多维耦合下非一般液体浸没的多层异质柔性带振动及微成形控制研究”(52375117)。

摘　　要：在ABAQUS中对柱-平板结构的微动接触行为展开仿真模拟,分析不同法向接触力P、轴向循环载荷σ条件下,微动接触区的应力分布规律;基于临界平面的思路,结合Smith-Watson-Topper(SWT)微动损伤参数,进一步研究模型微动疲劳寿命及其影响因素。结果表明:P的改变会直接影响接触压力P0和接触半宽a;σ对轴向正应力和切应力的影响较大;SWT参数的最大值总是发生在接触区边缘,证明此处是结构的薄弱点;增加P和σ均会使疲劳寿命值降低,但过大的P和σ会减缓这种影响效果。In ABAQUS,the fretting contact behavior of the column-plate structure was simulated.The stress distribution law of the fretting contact zone under the condition of different normal contact force P and axial cyclic loadσwas analyzed.Based on the idea of critical plane,combined with the Smith-Watson-Topper(SWT)fretting damage parameters,the fretting fatigue life of the model and its influencing factors were further studied.The results showed that the change of P would directly affect the contact pressure P0 and the contact half-width a.σhad a great influence on the axial normal stress and shear stress.The maximum value of the SWT parameter always occurs at the edge of the contact zone,which proved that this was the weak point of the structure;increasing P andσwould reduce fatigue life,but excessive P andσwould slow down this effect.

关 键 词：接触应力 微动疲劳 SWT参数 临界面法 微动疲劳寿命 

分 类 号：O346.2[理学—固体力学]