轴向预负载对细薄钢管激光弯曲机制的影响

Research on Bucking Mechanism in Laser Tube Forming with Axial Preload

应用ABAQUS有限元仿真软件,针对连续波(CW)CO2激光照射细薄金属管材过程,建立了弯曲过程的热能和机械模型,进而对弯曲过程中的温度、应力、残余应力的分布和弯曲角度进行了数值仿真,研究了各参数对变形机制的影响。设计了与仿真对应的激光照射管材弯曲实验,将实验数据和仿真数据进行比较,结果表明了该弯曲模型的有效性,并分析了仿真和实验数据产生差异的原因。

Heat energy and engine models of bucking process for continuous wave （CW） CO2 laser irradiating thin metal tube are built with finite element method （FEM） of ABAQUS. On the models, the temperature, stress, residual stress distribution and bucking angles are simulated numerically,and the deformation mechanism caused by changing the parameters is researched. The experiments are designed according to the simulation. The results show that the bucking model built in the study is valid,and thd differences between the results of simulation and experiments are analyzed.