激光热裂法非对称切割玻璃路径偏移研究  

Research of the deviation of the separation path in laser asymmetry cutting glass with laser induced thermal-crack propagation

作　　者：周国斌[1] 王凯旋[1] 贾虹[1] ZHOU Guobin;WANG Kaixuan;JIA Hong(College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China)

机构地区：[1]浙江工业大学机械工程学院,浙江杭州310014

出　　处：《浙江工业大学学报》2019年第2期165-169,共5页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(10972198);浙江省科技厅资助项目(2009C31104)

摘　　要：针对激光热裂法非对称切割液晶玻璃路径偏移问题,基于传热学和断裂力学基本理论,用ABAQUS建立有限元(FEM)模型模拟温度场分布,建立扩展有限元(XFEM)模型模拟裂纹动态扩展过程,研究了激光功率、光斑半径、扫描速度及切割位置对路径偏移量大小的影响。结果表明:激光热裂法非对称切割路径两侧应力分布不同,切割路径向材料尺寸小的一侧偏移;切割位置对偏移量影响最大,激光功率影响最小;激光功率越大、扫描速度越小以及切割位置距对称切割位置越远,则偏移量越大;当光斑半径小于1.6 mm时,偏移量随光斑半径的增大而减小,反之则增大。Aiming at the deviation of the separation path in laser asymmetry cutting glass with laser induced thermal-crack propagation(LITP), the finite element method(FEM) was used to simulate the temperature field distribution based on the theory of heat transfer and fracture mechanics. The extended finite element method (XFEM) was used to simulate the dynamic propagation of crack by the software ABAQUS,and the influence factors of the deviation of the separation path was studied. The results show that the stess distribution between the two side of separation path is not symmetrical in laser asymmetry cutting glass with LITP, and the separation path diverges to the smaller part of the glass. The cutting position has the greatest effect on the deviation of separation path, while the laser power has minimum effect. Larger laser power, smaller scanning speed and farther away from the symmetrical cutting position would result lager deviation. While the effect of spot radius is complex, when the spot radius is less than 1.6 mm, the deviation of the separation path decreases with the increase of spot radius, otherwise it increases.

关 键 词：激光热裂法 路径偏移 扩展有限元法 玻璃 

分 类 号：TN249[电子电信—物理电子学]