论文部分内容阅读
激光微冲击成形(μLPF)是利用脉冲激光产生的等离子体爆轰波的冲击力效应使超薄板材产生塑性变形的新技术。通过自主开发的有限元网格划分程序MicroMesh,实现了规则晶粒、晶界以及不规则晶粒、晶界的网格划分,并利用动态显式有限元方法(FEM),对超薄板材脉冲激光微冲击成形过程进行了晶粒级的数值模拟。较之一般的连续介质有限元方法,考虑晶粒和晶界的有限元法能够更好地反映板材的微观组织与性能。研究结果表明,该方法可以有效地模拟激光微冲击成形中板材的变形过程。
Laser micro-impact forming (μLPF) is the use of pulsed laser plasma detonation wave impact effect of plastic deformation of the new sheet metal technology. Through the self-developed finite element meshing program MicroMesh, the regular grain, grain boundary and irregular grain and grain boundaries are meshed, and the dynamic explicit finite element method (FEM) Laser micro-impact forming process of grain-level numerical simulation. Compared with the conventional finite element method for continuous media, the finite element method considering the grain boundaries and the grain boundaries can better reflect the microstructure and properties of the sheet metal. The results show that this method can effectively simulate the deformation process of plate in laser micro-impact forming.