摘要
依据流体力学中的流线理论,选用了一个较为通用的流线模型,对正交金属切削时的塑性变形进行了分析研究.对实验获得的切削中的流线轨迹和流线模型进行拟合,确定了模型中的几何参数.应用流线理论和塑性理论相结合的方法,计算了剪切区的应变率分布,其结果与前人的实验和计算结果基本吻合,说明此流线模型可以用来分析金属切削中的塑性变形.对应变率进行数值积分,得到了剪切区的应变分布.根据计算的应变结果,提出了一种定义剪切区形状的方法.
The plastic deformation of metal during orthogonal cutting was analyzed according to the streamline theory in fluid mechanics, with a general streamline model introduced. The geometrical parameters in this model were determined by fitting the flow lines traced in experiments with the streamline model. Then, the distribution of strain rate in primary shear zone was calculated via combining the streamline analysis with plasticity theory. The results revealed that the distribution thus calculated conforms to the experimental results in earlier works, i. e. , the streamline model is available to analyze the plastic deformation during metal cutting. The distribution of strain in primary shear zone is given by numerical integration. A new method is therefore proposed defining the shape of shear zone in accordance to the results of strain.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第8期1185-1188,共4页
Journal of Northeastern University(Natural Science)
基金
国家"十一五"重大专项科技支撑计划项目(2006BAF01A19)
关键词
正交切削
塑性变形
流线模型
应变
剪切区形状
orthogonal cutting
plastic deformation
streamline model
strain
shape of shear zone
作者简介
毕雪峰（1983-），女，辽宁辽阳人，东北大学与法国梅兹大学联合培养博士研究生；Correspondent： BI Xue-feng, E-mail： xuefeng.bi@gmail.com
刘永贤（1945-），男，辽宁台安人，东北大学教授，博士生导师．
