摘要
针对TA15钛合金材料,建立激光弯曲成形的三维热力耦合有限元仿真模型,得到不同加工参数下的材料温度场及变形场。通过搭建弯曲试验和测试系统,获得了部分加工参数下钛合金板的温度场和变形数据,并与仿真数据进行对比,验证了数值模型的有效性。基于板材厚度方向温度和塑性应变的分布,明确了在激光弯曲成形中的主导机制。研究了激光弯曲成形中的翘曲变形现象,提出可用于抑制翘曲变形的来回扫描加工方法。
For TA15 titanium alloy material,a three-dimensional thermal-mechanical coupling finite element simulation model of laser forming was established.The material temperature field and deformation field under different processing parameters were obtained.By building a bending testing system,the temperature and deformation field of the titanium alloy under different processing parameters were obtained,and compared with the simulation results.The validity of the numerical model was verified.Based on the distribution of temperature and plastic strain in the thickness direction of the sheet,the dominant mechanism in laser forming was clarified.The edge effect in laser forming was studied,and a back-and-forth scanning processing method that can be used to suppress the edge effect was proposed.
作者
李紫慧
杨恒峰
张高磊
章直凡
胡晓勇
沈洪
Li Zihui;Yang Hengfeng;Zhang Gaolei;Zhang Zhifan;Hu Xiaoyong;Shen Hong(Beijing Xinghang Electro-mechanical Equipment Co.,Ltd.,Beijing 100074,China;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《应用激光》
CSCD
北大核心
2023年第4期94-99,共6页
Applied Laser
