锻压技术

含有纳米级夹杂物的滚动体的应力分析

英文标题：Stress analysis on the rolling element with nano-sized inclusion

作者：孙浩孙登月许猛

单位：燕山大学

分类号：TG333.7+1

出版年,卷(期):页码：2016,41(5):78-81

摘要：

在滚动轴承工作状态下，滚动接触过程中通常会遇到滚动体内表面含有纳米级夹杂物的情况，纳米级夹杂物会影响滚动体的疲劳寿命。利用TLP3接触疲劳试验机对滚动体的疲劳寿命进行研究，发现纳米级夹杂物是滚动体疲劳寿命的主要影响因素，并基于此问题进行有限元仿真验证。以2 μm夹杂物为模型，突破性地实现了网格局部极细划分，网格最小为0.125 μm。以有限元软件Abaqus为基础，对滚动接触过程中滚动体以及纳米级夹杂物周围进行应力分析。研究发现，在夹杂物处应力集中，最大等效应力为1634 MPa。

Under the working condition of rolling bearing, the nano-sized inclusion is often found in the inside surfaces of rolling elements in the process of rolling. Experiments show that the fatigue life of the rolling element is influenced by the nano-sized inclusion. With the help of TLP3 contact fatigue testing machine, fatigue life of rolling elements was studied, and the nano-sized inclusion is regarded as the main factor of fatigue life of rolling elements. Then, finite element simulation result was verified by experiment based on this issue. For the model of the inclusion of 2 μm, the very fine grid division was completed innovatively, and the grid minimum is 0.125 μm. The stress around the nano-sized inclusion and rolling element in rolling process was analyzed by the finite element software Abaqus. The stress concentration is found on the inclusion, and the maximum equivalent stress is 1634 MPa.

基金项目：

河北省自然科学基金资助项目（E2012203008）

孙浩（1989-）,男，硕士研究生孙登月（1964-），男，博士，教授，博士生导师

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