摘要
借助大型非线性有限元软件,应用二维轴对称弹塑性有限元法对铍铜管不同工艺拉拔过程中的应力与应变进行了模拟,并结合实际加工质量问题进行分析。结果表明:空拔后铍铜管材的轴向残余应力较大,外表面有很高的拉应力,内表面有很高的压应力;而固定短芯头拉拔后管材的残余应力较小。铍铜管固定短芯头拉拔过程中的等效应变和等效应力的变化比较平缓,变形较均匀;而空拔后等效应变和等效应力分布不均匀。这表明固定短芯头拉拔铍铜管的产品质量和精度都比较高,比空拉拔工艺合理。
In virtue of large-scale nonlinear finite element software,finite element method of two-dimensional axial symmetry of elasticity and plasticity was used to simulate diversification of stress and strain in drawing process of beryllium bronze tubing,and actual machining quality problems were analyzed.The axial residual stress of the beryllium bronze tubing was relatively big after hollow drawing.The tubing outside of axial direction had a high tensile stress,and the inside had a high compression stress.Corres...
出处
《机械工程材料》
CAS
CSCD
北大核心
2007年第12期75-78,共4页
Materials For Mechanical Engineering
关键词
铍铜管材
固定短芯头拉拔
有限元法
beryllium bronze tubing
pulling of fixed short rod
finite element method
