实体膨胀管大塑性变形有限元分析

Finite Element Analysis for Severe Plastic Deformation of Solid Expandable Tube

应用有限元ABAQUS软件建立了膨胀管膨胀模型,分析膨胀过程中膨胀率、膨胀锥系统推力、膨胀长度及壁管厚变化的相对关系。分析结果表明:建立的模型可以预测膨胀管膨胀过程的推力大小、膨胀管长度以及厚度变化;当膨胀率分别为16%、20%、24%时,膨胀后厚度变化分别为6.67%、10.30%、13.16%,长度缩短分别约为4.4%、5.7%、6.2%,膨胀过程所需要的推力分别为940、1 092、1 213kN。

FEA ABAQUE was applied to establish expandable tube model, and the correlation of expansion rate, expansion cone thrust, expansion length and wall thickness. The result shows that thrust, length and thickness could be predicted by using the established model. At the expandable rate of 16%,20% ,and 24% ,expandable thickness change is 6.67% ,10.30% ,and 13.16% ;length shorten is 4.4%,5.7%,and 6.2% ;and the thrust needed is 940,1 093,and 1 213 kN respectively.