Numerical simulation of metal removal in laser drilling using radial point interpolation method

Abidou, Diaa; Yusoff, Nukman; Nazri, Nik Nadia Nik; Awang, M. A. Omar; Hassan, Mohsen A.; Sarhan, Ahmed A.D.

doi:10.1016/j.enganabound.2017.01.010

Cited by 20 publications

(10 citation statements)

References 38 publications

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“…Some effort has been made in this field and a wide range of applications are reported in the literature, including but not limited to hardening [ 4 ], laser ablation [ 5 ], laser cutting [ 6 ], laser drilling [ 7 ], laser welding [ 8 , 9 ], and additive manufacturing of metal powder [ 10 , 11 ]. Irrespective of the application, the prediction of the temperature field is crucial for many purposes, including but not limited to non-destructive real-time evaluation of the process [ 2 ], minimization of residual stresses, and heat accumulation during additive manufacturing [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Laser Heating of Aluminum and Model Validation via Two-Color Pyrometer and Shape Assessment

Alfieri

2018

Materials

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The modeling of laser-based processes is increasingly addressed in a competitive environment for two main reasons: Preventing a trial-and-error approach to set the optimum processing conditions and non-destructive real-time control. In this frame, a thermal model for laser heating in the form of non-penetrative bead-on-plate welds of aluminum alloy 2024 is proposed in this paper. A super-Gaussian profile is considered for the transverse optical intensity and a number of laws for temperature-dependent material properties have been included aiming to improve the reliability of the model. The output of the simulation in terms of both thermal evolution of the parent metal and geometry of the fusion zone is validated in comparison with the actual response: namely, a two-color pyrometer is used to infer the thermal history on the exposed surface around the scanning path, whereas the shape and size of the fusion zone are assessed in the transverse cross-section. With an average error of 3% and 4%, the model is capable of predicting the peak temperature and the depth of the fusion zone upon laser heating, respectively. The model is intended to offer a comprehensive description of phenomena in laser heating in preparation for a further model for repairing via additive manufacturing.

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Section: Introductionmentioning

confidence: 99%

Simulation of Laser Heating of Aluminum and Model Validation via Two-Color Pyrometer and Shape Assessment

Alfieri

2018

Materials

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“…The laser beam is focused on the target material through a lens. Focused laser beam will raise the local temperature of the material to a melting or degradation point, thereby causing local melt or degradation through the depth of the material [ 60 ], so thermoplastics are disintegrated by reaching melting point, while thermosetting polymers are degraded directly without melting. The molten or degraded material in the cutting zone is then ejected by a compressed inter gas jet that works with the focused laser beam coaxially, inter compressed gas is also to prevent fire.…”

Section: Cutting Processes Of Natural Fiber-reinforced Polymer Commentioning

confidence: 99%

Cutting Processes of Natural Fiber-Reinforced Polymer Composites

et al. 2020

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Recently, natural fiber-reinforced polymers (NFRPs) have become important materials in many engineering applications; thus, to employ these materials some final industrial processes are needed, such as cutting, trimming, and drilling. Because of the heterogeneous nature of NFRPs, which differs from homogeneous materials such as metals and polymers, several defects have emerged when processing the NFRPs through traditional cutting methods such as high surface roughness and material damage at cutting zone. In order to overcome these challenges, unconventional cutting methods were considered. Unconventional cutting methods did not take into account the effects of cutting forces, which are the main cause of cutting defects in traditional cutting processes. The most prominent unconventional cutting processes are abrasive waterjet (AWJM) and laser beam (LBM) cutting technologies, which are actually applied for cutting various NFRPs. In this study, previously significant studies on cutting NFRPs by AWJM and LBM are discussed. The surface roughness, kerf taper, and heat-affected zone (HAZ) represent the target output parameters that are influenced and controlled by the input parameters of each process. However, this topic requires further studies on widening the range of material thickness and input parameter values.

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“…A more or less linear behavior was noticed in all numerical graphs. According to the experimental evidence, however, the laser absorptivity coefficient at lower temperatures was less than its values at higher temperatures [10,12,13]. In other words, at the beginning of the laser drilling process, this coefficient had a lower value compared to the later stages, when it abruptly increased due to the rapid increase in both temperature and depth.…”

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confidence: 93%

“…More recent works include the 3D laser cutting simulation by [10] using a commercial SPH package and an improved SPH formulation for heat transfer in the laser ablation of aluminum [11]. Other interesting efforts, more closely falling into the scope of this paper, are the application of the Radial Point Interpolation Method (RPIM) [12] and the Meshless Local Petrov-Galerkin (MLPG) collocation method [13] for the heat conduction in laser drilling. In [14], the authors reproduced the results of [12] by using yet another particle-based scheme.…”

Section: Introductionmentioning

confidence: 99%

“…Other interesting efforts, more closely falling into the scope of this paper, are the application of the Radial Point Interpolation Method (RPIM) [12] and the Meshless Local Petrov-Galerkin (MLPG) collocation method [13] for the heat conduction in laser drilling. In [14], the authors reproduced the results of [12] by using yet another particle-based scheme. It is worth mentioning that the number of SPH developments in other fields of application is overwhelming, and numerous efforts have been made to model a variety of structural [15], CFD [16,17], and manufacturing simulations [18][19][20][21], to name a few.…”

Section: Introductionmentioning

confidence: 99%

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3D Thermal Simulation of a Laser Drilling Process with Meshfree Methods

Afrasiabi

Wegener

2020

JMMP

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Numerical simulation of laser drilling is rapidly gaining interest in academia and industry since this process remains one of the most important and widely-used technologies in modern manufacturing. Meshfree methods such as Smoothed Particle Hydrodynamics (SPH) have proven to be successful as a numerical tool for the computation of the heat transfer and material removal associated with a laser drilling problem. Nonetheless, the vast majority of recent developments incorporate an inconsistent SPH kernel into their thermal simulations. In this paper, several enhanced schemes are implemented to address this problem by solving the heat transfer more accurately. These meshfree schemes can provide a second-order accurate discretization of the Laplace operator and abolish the inconsistency issue of the standard SPH kernels. An efficient approach is additionally suggested to handle the associated boundary conditions, which relies on the idea of the color function and particle label. The implementation is initially validated by a 3D benchmark study and then applied for the first time to a laser drilling problem.

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Numerical simulation of metal removal in laser drilling using radial point interpolation method

Cited by 20 publications

References 38 publications

Simulation of Laser Heating of Aluminum and Model Validation via Two-Color Pyrometer and Shape Assessment

Simulation of Laser Heating of Aluminum and Model Validation via Two-Color Pyrometer and Shape Assessment

Cutting Processes of Natural Fiber-Reinforced Polymer Composites

3D Thermal Simulation of a Laser Drilling Process with Meshfree Methods

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