激光喷丸后板料表面微观形貌的可视化数值研究  

Visual Numerical Study on Surface Micro-Topography of Sheet Metal by Laser Peening

作　　者：周建忠[1] 杜建钧[1] 黄舒[1] 杨超君[1] 倪敏雄[1] 曹向广[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《中国激光》2007年第5期728-732,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(50475127;50675090);教育部科学技术研究重点项目(204052);国防航空基金(02H52053);江苏省自然科学基金(BK2004063)资助课题

摘　　要：对不锈钢SUS304板料进行了激光喷丸成形的可视化数值模拟分析和实验研究。以有限元分析软件ABAQUS/CAE为平台,通过建立的激光喷丸过程冲击波加载的转换模型,把脉冲激光能量转换成冲击波压力,利用用户子程序解决了脉冲激光束连续逐点喷丸板料变形的轨迹控制,实现激光喷丸板料动态变形过程的可视化。通过所建立的模型,对脉冲激光喷丸后材料表面的微观塑性流动过程进行了分析,研究了表面微观形貌的变化。Visual numerical simulations and experiments of laser peen forming on stainless SUS304 sheet metal are done. Based on the finite element analysis software ABAQUS/CAE, the conversion model during laser peen forming of laser shock wave loading is founded, by which the pulsed laser energy is converted to shock wave pressure. The tracks controlling of sheet metal deforming by pulsed laser continuous peening is solved with user subprogram. The dynamic deforming process of sheet metal by laser peening is visualized. With the above model, the micro plastic fluid process of the sheet metal after pulsed laser peening is analyzed, and the variation of surface micro-topography is studied.

关 键 词：激光技术 脉冲激光束 表面微观形貌 可视化数值模拟 

分 类 号：TN249[电子电信—物理电子学] TG665[金属学及工艺—金属切削加工及机床]