第42卷第4期 Vol. 42No. 4
假压技术
FORGING &STAMPING TECHNOLOGY
2017年4月 Apr.2017
基于改进Lemaitre损伤模型的圆锥滚子孔型斜轧过程损伤预测
马明辉2，钱东升12，曹强"-2，邓加东2.3
（1.武汉理工大学材料科学与工程学院，湖北武汉430070；2.现代汽车零部件技术湖北省重点实验室，湖北武汉430070：
3.武汉理工大学汽车工程学院，湖北武汉430070)
摘要：根据圆锥滚子热斜轧成形过程中的特点以及轧件的受力状态分析，改进了传统的Lemaitre损伤模型，充分考虑了正、负静水压应力状态下损伤演化的差异性，以及应变速率和变形温度变化对损伤演化的影响。将改进的Lemaitre损伤模型借助 SIMUFACT平台的二次开发技术嵌人到圆锥滚子孔型斜轧有限元模型中，创建了圆锥滚子孔型斜轧的损伤预测模型。同时，采用同样的建模技术建立了轴承钢球孔型斜轧损伤预测模型，并与文献中的实验结果对比，验证了改进的Lemaitre损伤模型的可靠性。圆维滚子孔型斜轧损伤预测模型的模拟结果表明，圆锥滚子热斜轧过程中损伤程度较大的区域主要为连接颈轴心
及靠近连接颈轴心的区域，而且滚子小端心部损伤程度明显大于滚子大端，关键词：圆锥滚子；孔型斜乳；Lemaitre损伤模型；损伤预测；有限元模拟
DOI: 10. 13330/j. issn. 1000-3940. 2017. 04. 022 中图分类号：TG335.19
文章编号：1000-3940（2017）04-0123-08
文献标识码：A
Damage prediction on helical rolling for tapered roller based on the
modified Lemaitre damage model
Ma Minghui'-2, Qian Dongsheng"2, Cao Qiang'-2, Deng Jiadong.3
(1. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; 2. Hubei Key Laboratory of Advanced Technology of Automotive Parts, Wuhan 430070, China; 3. School of Automotive Engineering;
Wuhan University of Technology , Wuhan 430070, China)
Abstract : According to the characteristics of tapered roller in the helical rolling process and the analysis of stress state, a traditional Lemai tre damage model was improved by considering the diference of damage growth under positive and negative hydrostatic pressure stress stale and the influences of strain rate and deformation temperature on damage groth. Then, the modified model was implemented in the FE model of helical rolling for tapered roller by the secondary development technology of SIMUFACT, and the damage prediction model of helical roll-ing for tapered roller was established. At the same time, the damage prediction model of helical rolling for bearing steel ball was also set up by the above technology , and the experimental results were compared with literatures to verify the reliability of modified Lemaitre damage mod-el. The simulation results show that the large damage zones are located in the axial centre of connecting neck and near the axial centre of con necting neck in the helical rolling proces of tapered roller, and the central damage in small end of tapered roller is larger than that in big end Key words : tapered roller; helical rolling; Lemaitre damage model; damage prediction; finite element simulation
孔型斜轧（简称斜轧）是一种生产圆锥滚子毛坏等回转体零件的先进塑性成形新技术，与车削、锻压或铸造等传统工艺相比，具有材料利用率高、
收稿日期：20161028；修订日期：20170125
基金项目：教育部创新团队发展计划项目（IRT13087）；潮北省高增人才引领计划项目（2012-86）；潮北省重大科技创新计划项目（2015AAA005）
作者简介：马明辉（1990－），男，硕士研究生 E-mail: 993119897@ qq. com
通讯作者：钱东升（1982-），男，博士，副教授
E-mail: qiands@ whut. edu. cn 万方数据
力学性能较优、尺寸精度高、能耗低以及利于专业化生产等显著优势"。但是，斜轧这种回转成形工艺生产的零件，在实际生产中如果工艺调控不当，由于心部金属承受周期性的载荷，容易使零件心部损伤程度过大而导致疏松或孔腔缺陷。因此，建立合理、有效的方法来预判零件斜轧过程的心部损伤，对于提高斜轧产品质量有着重要作用，
Lemaitre损伤模型以热力学不可逆过程为基础，假设损伤和等效应变呈线性关系，以弹性模量的变化分析金属成形过程中的损伤，能够较为准确地预测损伤和断裂的状态[2]。LeeSW等[3]利用
特种成形栏目是由北京机电研究所塑性工程技术中心①赞助刊出