弯管不同位置横截面畸变的有限元模拟及试验

FE Simulation and Test for the Deformation of Tubes’ Different Cross-sections

利用有限元方法对弯管横截面形状变化进行了模拟分析和试验验证。指出了较大弯管横截面变化产生在弯曲中心角附近,较小的变化产生在弯、直管相切处。弯管横截面长轴变化率的有限元计算偏差较大,其原因与管材和弯模实际匹配的误差有关。

By using the finite element method,the simulation analysis and test verification on the tubes’ cross-section deformation are carried out.It is pointed out that the change of tubes’ larger cross-sec-tion occurs nearby bending center corner and the change of smaller one takes place in tubes’ tangent segment.After the finite element calculation,there is large deviation in change-ratio of long axis on the cross-section,actual the reason is caused by the error of the match between tubes and dies.