研究目的
Developing a meshfree Particle Strength Exchange (PSE) method for metal removal in a simplified laser drilling problem to address thermal issues of complex manufacturing processes.
研究成果
The proposed PSE method is effective for simulating heat transfer in laser drilling, offering a balance between accuracy and computational efficiency. It simplifies the implementation compared to other meshfree methods and accurately predicts the penetration depth of the laser beam. Future work could extend the model to include more complex physical aspects like molten flow and assist gas effects.
研究不足
The study simplifies the laser drilling process by neglecting the hydrodynamic behavior of molten material and the effect of assist gas. The model assumes isotropic and homogeneous material properties and a constant laser beam radius.
1：Experimental Design and Method Selection:
The study employs a meshfree Particle Strength Exchange (PSE) method for solving the transient state heat transfer problem in laser drilling. The method is a fully Lagrangian approach, chosen for its simplicity and efficiency compared to other meshfree methods.
2：Sample Selection and Data Sources:
A case-study on single-pulse laser heating of a stainless steel (SS-316L) workpiece is conducted. The workpiece dimensions and thermo-physical properties are specified.
3：List of Experimental Equipment and Materials:
A static laser beam with a Gaussian intensity distribution is used as the external heat source. The parameters include laser power, absorptivity, and beam radius.
4：Experimental Procedures and Operational Workflow:
The simulation involves discretizing the workpiece with uniformly spaced particles, applying the laser heat source, and solving the heat transfer equation using the PSE method. Surface particles are identified and treated with boundary conditions.
5：Data Analysis Methods:
The simulation results are compared against numerical and experimental data from the literature to assess the method's performance.
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