基于改进Lemaitre损伤模型的圆锥滚子孔型斜轧过程损伤预测

发布时间：2018-04-19 05:18

本文选题：圆锥滚子 + 孔型斜轧　；参考：《锻压技术》2017年04期

【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入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。圆锥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。
[Abstract]:According to the characteristics of tapered roller hot cross rolling forming process and the analysis of the stress state of the rolling piece, the traditional Lemaitre damage model is improved, and the difference of damage evolution under positive and negative hydrostatic stress is fully considered.And the effect of strain rate and deformation temperature on damage evolution.The improved Lemaitre damage model is embedded into the finite element model of taper roller pass cross rolling with the help of the secondary development technology of SIMUFACT platform, and the damage prediction model of taper roller pass cross rolling is established.At the same time, the damage prediction model of bearing steel ball cross rolling is established by using the same modeling technique, and the reliability of the improved Lemaitre damage model is verified by comparing with the experimental results in the literature.The simulation results of the damage prediction model for tapered roller pass cross rolling show that the regions with large damage degree during hot cross rolling are mainly connected with and near the connecting neck axis.Moreover, the damage degree of the center of the small end of the roller is obviously greater than that of the large end of the roller.
【作者单位】：武汉理工大学材料科学与工程学院;现代汽车零部件技术湖北省重点实验室;武汉理工大学汽车工程学院;
【基金】：教育部创新团队发展计划项目(IRT13087) 湖北省高端人才引领计划项目(2012-86) 湖北省重大科技创新计划项目(2015AAA005)
【分类号】：TG335.17

【相似文献】