The Crack Propagation on Glass in Laser Thermal Cleavage
Authors: Jehnming Lin
In the laser cleavage of glass, the laser is mostly adopted as a heat source to generate a thermal stress state on the substrates. The crack propagation of the soda-lime glass in the laser thermal cleavage with the straight-turning paths was investigated in this study experimentally and numerically. The crack propagation was visualized by a high speed camera with the off-line examination on the micro-crack propagation. The temperature and stress distributions induced by the laser heat source were calculated by ANSYS software based on the finite element method (FEM). With the cutting paths in various turning directions, the experimental and numerical results were in comparison and verified. The fracture modes due to the normal and shear stresses were verified at the turning point of the laser cleavage path. It shows a significant variation of the stress profiles along the straight-turning paths and causes a change on the fracture modes.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1126233Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1072
 WM. Steen, Laser material processing. Berlin: Springer; 1998.
 RM. Lumley, Controlled separation of brittle materials using a laser. American Ceramic Society Bulletin 1969;48(9):850–4.
 CH. Tsai, CJ. Chen, Application of iterative path revision technique for laser cutting with controlled fracture. Optics and Lasers in Engineering 2004;41:189-204.
 Y. Miyashita, M. Mogi, H. Hasegawa, S. Sujatanod, Y. Mutoh, Study on a Controlling Method for Crack Nucleation and Propagation Behavior in Laser Cutting of Glass. Journal of Solid Mechanics and Materials Engineering 2008;2(12).
 N. Cai, LJ. Yang, Y. Wang, ZG. Tian, Experimental Research of YAG Laser Cutting Soda-lime Glass Sheets with Controlled Fracture. Key Engineering Materials 2010;431-432:507-510.
 S. Nisar, L. Li, MA. Sheikh, AJ. Pinkerton, The effect of continuous and pulsed beam modes on cut path deviation in diode laser cutting of glass. International Journal of Advanced Manufacturing Technology 2010;49(1-4):167-175.
 S. Nisar, L. Li, MA. Sheikh, AJ. Pinkerton, S. Safdar, The effect of laser beam geometry on cut path deviation in diode laser chip-free cutting of glass. Journal of Manufacturing Science and Engineering. Transactions of the ASME 2010; 132(1):0110021-0110029.
 YZ. Wang, JM. Lin, Characterization of the laser cleaving on glass sheets with a line-shape laser beam. Optics and Laser Technology 2007;39:892-899.
 K. Yamamoto, N. Hasaka, H. Morita, E. Ohmura, Three-dimensional thermal stress analysis on laser scribing of glass. Precision Engineering 2008;32:301-308.
 NP. Bansal, RH. Doremus, Handbook of glass properties. Orlando: Academic Press, Inc.; 1986.
 CH. Tsai, CS. Liou, Fracture mechanism of laser cutting with controlled fracture. Journal of Manufacturing Science and Engineering. Transactions of the ASME 2003;125:519–28.
 ANSYS Mechanical APDL Introductory Tutorials. Canonsburg: ANSYS, Inc.; 2012.
 FP Incropera, DP. de Witt, Fundamentals of heat and mass transfer. 4th ed. New York: Wiley; 1996.