薄壁铝合金枝杈管件粘性介质内压成形及数值模拟

Viscous Inner Pressure Forming and Its Numerical Simulation of Thin-walled Aluminum Alloy Bifurcation Tube

选用有限元软件ANSYS/LS-DYNA进行了薄壁铝合金枝杈管件粘性介质内压成形过程的数值模拟,得到了不同变形阶段成形试件的等效应力变化规律,以及粘性附着力影响因子对成形试件壁厚减薄率的影响。在此基础上,进行了薄壁铝合金枝杈管件粘性介质内压成形试验,验证了数值模拟结果的准确性。结果表明,粘性介质可以控制成形过程材料流动,能够整体成形出薄壁铝合金枝杈管件。

Viscous inner pressure forming process of thin-walled aluminum alloy bifurcation tube was simulated with finite element software ANSYS/LS-DYNA. The varying law of equivalent stress at every stage of tube forming process and influence of viscosity adhesion factors on the wall thickness thinning rate of the specimen were obtained. On this basis, the experiment of viscous inner pressure forming of thin-walled aluminum alloy bifurcation tube was carried out. The accuracy of numerical simulation results was verified. The results show that the viscous inner pressure can control material flowing in forming process and form thin-walled aluminum alloy bifurcation tube integrally.