钛合金板料热压弯过程数值模拟

采用有限元软件ABAQUS对Ti-6Al-4V合金板料热压弯成形过程进行了模拟,分析了应力应变分布规律和工艺参数对成形过程的影响。研究表明,压弯过程的变形主要集中在大厚度区域中间位置;当板料表面与模具多点接触后,板料由自由弯曲变为校正弯曲,成形力急剧增大;保压600s时板料最大回弹量和上模成形力分别降低84%和94%。在相同工艺条件下的试验结果验证了有限元模拟的准确性。

Numerical Simulation of Hot Bending for Titanium Alloy Sheet

A finite element model is established to simulate the hot bending process of titanium alloy sheet by using ABAQUS software.The stress and strain distribution and the influence of process parameters on the forming process are analyzed.The results indicate that deformation distribution mainly concentrates at the center position of the thickest area.When the new contact position appears between the upper die and the sheet,the forming sheet enters the correction bending phase and the forming force increases sharply.When holding 600s,the maximum springback displacement and the upper die forming force reduces 84％ and 94％,respectively.The simulated result shows a good agreement with the deformed part at the same conditions.