研究目的
Investigating the temperature and stress formation in laser cutting of holes in Zirconia Toughened Alumina (ZTA) ceramic plates to improve cut hole quality.
研究成果
The numerical simulation reveals exponential distribution of temperature and stress profiles, with maximum temperature and stress values of 3300 °C and 5 GPa, respectively, near the cut hole region. The study suggests future work to verify simulation results with experimental data.
研究不足
The study assumes material properties are not a function of temperature, neglects vaporization of material, and considers only natural convection. The simulation does not account for mechanical stress due to gas pressure or shear stress due to liquid metal flow.
1：Experimental Design and Method Selection:
The study uses finite element method (FEM) for simulating laser cutting of ZTA ceramic plates, focusing on temperature and stress analysis.
2：Sample Selection and Data Sources:
A 3D geometry of ZTA ceramic plate (90 mm×90 mm×6 mm) with a through hole diameter of
3：5 mm is created for simulation. List of Experimental Equipment and Materials:
ANSYS? parametric design language (APDL) software is used for simulation. Material properties include density = 4200 kg/m3, emissivity =
4：85, latent heat of fusion = 900 kJ/Kg, etc. Experimental Procedures and Operational Workflow:
The simulation involves applying a Gaussian heat source distribution, moving along the circumference of the hole, with parameters like average laser power = 500 W, beam spot diameter = 400 μm, and cutting velocity = 30 mm/min.
5：Data Analysis Methods:
Temperature and stress profiles are analyzed using Fourier’s law of heat conduction and von-Mises stress equations.
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