变形量对铜包铝复合扁线轧制变形的数值模拟与实验研究.pdfVIP

• 157 • 变形量对铜包铝复合扁线轧制变形的数值模拟与实验研究/:罗奕兵等 变形量对铜包铝复合扁线轧制变形的数值模拟与实验研究祷 罗奕兵，戴晓元，张健 〈长沙理工大学汽车与机械工程学院，工程车辆轻量化与可靠性技术湖南省高校重点实验室，长沙 410004) 摘要 采用刚塑性有限元法，研究了变形量对铜包铝复合棒材由圆断面到扁平断面的轧制变形行为的影响， 并对模拟结果进行了实验验证。结果表吱L钥包铝摔材平极*L制的宽展率和延伸率与压下率之间存在较为明显的线 性关系 s 随压下率的增加，宽展指数先增大后减小，在压下率为 40% 时达到最大，为1.趴在后续轧制造次中，局形断 面铜包铭复合材料的压下率对轧制延伸变形的影响比宽展变形更显著;有限元计算结果与实验结果具有较好的一效 性。 关键词 铜包铝扁线平辘轧制数值模拟 中图分类号:TG 335.8 文献标识码:A Numerical Simulation and Experimental Investigation on Rolling Deformation Strain of Copper Cladding Aluminum Flat Wires LUO Yibing , DAI Xiaoyuan , ZHANG Jian (Key Laboratory of Lightweight and Reliability Technology for Engineering Vehicle , College of Hunan Province , School of Automobile and Mechanic Engineering , Changsha University of Science and Technology , Changsha 410004) Abstract The deformation of copper cladding aluminum composite rod from circle cross section to flat cross section rolling process was investigated by rigid plastic finite element. Effect of strain on the defo口nation was analyzed combining with experiments. The results show that there is a linear relation between the reduction ratio and spread ra- tio , so the elongation ratio is. Spread exponent firstly increases and then decreases as reduction ratio increases. When reduction ratio is 40 %, the spread exponent is 1. 9 at the most. During the lateral passes of flat cross section compo- site , effect of reduction ratio on extension is more significant than spread deformation. Reasonable agreement of the FEM predictions and the experimental results is obtained.