摘要
用大变形弹塑性有限元法对金属板材柔性成形新工艺———激光弯曲进行了动态数值模拟。从热学及热力学的观点出发，阐明了该工艺的变形机理，建立了弯曲过程中的应力模型；论证了板料厚度对温度梯度和弯曲角度的影响，提出了能够实现激光弯曲工艺的最小相对光束半径的新概念，为该工艺进一步深入研究奠定了基础。模拟结果与试验吻合较好。
A new flexible forming technique of sheet metal, laser bending process, has been numerically simulated by using finite element method of large elastic plastic deformation. From the thermodynamics and the theory of heat, the mechanism of laser bending was expounded and the stress model in the process was built. The foundation was laid for further researching the technology. The influence of sheet thickness on the temperature gradient and bending angle was discussed. The new concept of minimal relative laser beam radius was proposed, on which the laser bending can be based. It was shown that the calculated values are in good accordance with the experiments.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
1999年第1期39-44,共6页
The Chinese Journal of Nonferrous Metals
基金
国家教育委员会留学回国人员资助费支持项目
关键词
激光弯曲
柔性成形
数值模拟
金属板材
板材厚度
laser bending flexible forming numerical simulation minimal relative laser beam radius
