摘要
金属板料的激光冲击成形(LSF)技术是利用高能激光诱导的高幅冲击波的力效应,而非热效应。它是在激 光冲击强化基础上拓展出的又一崭新的研究领域。根据爆轰波和爆炸气体动力学理论,建立了板料激光冲击成形 中,激光 能量转换体 靶材系统的冲击波压力的物理模型和理论估算式。通过对激光冲击波载荷作用下板料变形 过程的理论分析,建立激光冲击板料变形的数学模型,得到板料变形量与加工系统中各种参数之间的相互关系,为 加工过程中各种参数的合理优化,板料变形过程的有效控制,实现大面积金属板料的激光冲击成形提供了理论依 据。
Laser shock forming (LSF) is a novel technique realized by applying a compressive shock wave generated by laser shock on the surface of the metal. It is a mechanical, not a thermal process, and has a significant characterization of ultra-pressure and super plastic forming etc. In this paper, a physical model and the estimated formula of shockwave pressure of laser shock forming were found according to the detonation wave and explosive gas dynamical theory. On the base of experimental results and theory analysis, a mathematical model of the sheet deformation under one laser shot loading was established, the relationship between shockwave pressure and deformation of sheet metal was discussed, and the effects of factors such as laser parameters, boundary condition on the deformation of sheet metal were analyzed. These model and formula are very useful and can be used to predict the deformation of sheet metal loaded by laser shock, and provide a theory foundation to choose laser processing parameters reasonably and program the controlled software of laser shock forming.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2005年第1期135-138,共4页
Chinese Journal of Lasers
基金
国家自然科学基金(50475127
50275068)
国家863计划项目(2002AA336030)
教育部科学技术研究重点项目(No.204052)
国防航空基金(02H52053)
江苏省自然科学基金(BK2004063)资助项目
关键词
激光技术
激光冲击
塑性变形
数学模型
金属板料
Explosive forming
High power lasers
Mathematical models
Plastics forming
Pulsed laser applications
Sheet metal
Shock waves
