论文部分内容阅读
利用有限元分析软件ABAQUS对恒弹性合金3J53超薄板激光冲击半模成形过程进行了数值模拟。探讨了不同激光脉冲能量对板料运动速度和成形精度的影响,以及相同能量下板料不同区域的运动速度规律。数值模拟表明,当激光脉冲能量较小时,板料不能与凹模碰撞,中心区域节点上下往复振动,振幅逐渐减小,最后处于静止状态;当激光脉冲能量较大时,板料中心与凹模底部发生剧烈碰撞,碰撞后产生反向运动,速度逐渐减小,在零值附近缓慢波动一段时间,最终衰减到零。通过调整激光脉冲能量能够得到理想的波形零件。研究结果表明,利用有限元分析软件ABAQUS能够预测板料在激光冲击成形中的速度变化规律,为深入研究激光冲击成形过程提供依据。
The finite element analysis software ABAQUS was used to simulate the forming process of the laser shock semi-die of the constant elastic alloy 3J53 ultrathin sheet. The effects of different laser pulse energies on the sheet moving speed and forming precision are discussed, and the rule of the moving speed in different regions of the sheet metal under the same energy is discussed. The numerical simulation shows that when the laser pulse energy is small, the sheet can not collide with the die, the center node vibrates up and down reciprocally, the amplitude decreases gradually, and finally stays at rest. When the laser pulse energy is large, A violent collision occurs at the bottom and a backward movement occurs after the collision. The speed gradually decreases and slowly fluctuates around zero for a period of time and finally decays to zero. By adjusting the laser pulse energy can be the ideal waveform parts. The results show that the ABAQUS software can predict the variation of the speed of sheet metal during laser shock forming, and provide the basis for further study on the laser shock forming process.