摘要
目的椭圆管件是最常见的圆柱管件变形状态,通常采用缩径方式矫圆,研究矫圆过程中影响塑性变形的关键参数。方法建立了椭圆柱管件正圆模型,找到了影响截面最大应力值的关键参数,即椭圆度和厚度半径比,并进行了无因次化。采用控制变量法,运用非线性有限元软件ABAQUS,模拟了不同椭圆度和厚度半径比的椭圆管件,正圆过程中的截面最大应力值。结果通过对比大量数据,得出了椭圆管正圆椭圆度和半径厚度比影响曲线以及塑性临界曲线。结论为揭示缩径矫圆机理,完善矫圆的预测提供了参考。
Objective Oval tube is the most common deformation of cylindrical tube,which is usually set round by radius shrinkage. The aim of this paper is to investigate the key parameters influencing the plastic deformation during the round setting process. Methods This paper established round setting model for cylindrical tube,identified the key parameters that affected the value of the maximal stress,the ovality and the thickness to radius ratio,and the model was made dimensionless. Using the variable controlling method and the nonlinear finite element software ABAQUS,oval tubes with different ovality and thickness to radius ratios were simulated,achieving the maximal stress values during the round setting process.Results By comparing large amounts of data,influencing curve of perfect circle ovality and radius to thickness ratio of the oval tube and the plastic critical curve were obtained. Conclusion The study provided reference for revealing the radius shrinkage round setting mechanism and improving the prediction of round setting.
出处
《精密成形工程》
2014年第5期102-107,共6页
Journal of Netshape Forming Engineering
关键词
椭圆管件
椭圆度
半径厚度比
屈服应力
缩颈正圆
oval tube
ovality
radius to thickness ratio
yield stress
necking down round setting