Numerical simulation of metal removal in laser drilling using meshless local Petrov–Galerkin collocation method

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

doi:10.1016/j.apm.2017.08.032

Cited by 13 publications

(19 citation statements)

References 24 publications

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“…The single-pulsed laser used here has a pulse duration of 150 µs and a peak power of 100 W exerted on a very thin sheet metal made of stainless steel with a thickness of less than 200 µm. Given these situations, a set of simplifying assumptions is outlined in the following similar to the reference model introduced by [10,13].…”

Section: Problem Statementmentioning

confidence: 99%

“…Listed in Table 2 is a summary of the parameters used for this simulation. The absorptivity coefficient a L was chosen to be 40% according to a very relevant investigation performed by [13] on the sensitivity of MLPG results to this parameter. Table 2.…”

Section: Laser Drilling Simulationmentioning

confidence: 99%

“…Table 2. Parameters and material properties used according to [10,13]. Muhammad et al [10] were the first who considered this experimental setup for SPH modeling and showed that a pulse of 150 µs could fully penetrate the metallic sheet with a thickness of 150 µm.…”

Section: Laser Drilling Simulationmentioning

confidence: 99%

“…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%

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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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Section: Problem Statementmentioning

confidence: 99%

Section: Laser Drilling Simulationmentioning

confidence: 99%

Section: Laser Drilling Simulationmentioning

confidence: 99%

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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“…The MLPG method does not need any mesh for either field interpolation or background integration. So far, considerable efforts have been made to use the MLPG method to solve various problems in the solid and fluid mechanics fields such as elasticity (Atluri and Zhu 2000; Baradaran et al 2011;Bagheri et al 2011;Mahmoodabadi et al 2014), elastodynamics (Batra and Ching 2002;Soares et al 2012;Heaney et al 2010), fracture (Feng et al 2009), crack analysis (Sladek et al 2010;Sladek et al 2012), heat transfer (Sladek et al 2004; Baradaran and Mahmoodabadi 2009; Baradaran and Mahmoodabadi 2010;Mahmoodabadi et al 2011;Karagiannakis et al 2016;Li et al 2018), vibrations (Andreaus et al 2005;Gu and Liu 2001a;Rashidi Moghaddam and Baradaran 2017), plate and shell (Sladek et al 2007;Li et al 2008;Sladek et al 2013;Vaghefi et al 2016), convection-diffusion (Chen et al 2018), Klein-Gordon equation (Darani 2017), electric-field integral equation (Honarbakhsh 2017), metal removal in laser drilling (Abidouab et al 2018) and fluid flow (Arefmanesh et al 2010;Najafi et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Development of the Meshless Local Petrov-Galerkin Method to Analyze Three-Dimensional Transient Incompressible Laminar Fluid Flow

Mahmoodabadi¹,

Mahmoodabadi²,

Atashafrooz³

2018

JSSCM

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In this paper, a numerical algorithm is presented to simulate the three-dimensional transient incompressible flow using a meshless local Petrov-Galerkin (MLPG) method. In the proposed algorithm, the forward finite difference (FFD) and MLPG methods are employed for discretization of time derivatives and solving the Poisson equation of the pressure, respectively. The moving least-square (MLS) approximation is considered for interpolation, while the Gaussian weight function is used as a test function. Furthermore, the penalty approach is applied to satisfy the boundary conditions. Moreover, in two examples, the accuracy and efficiency of this approach is compared with the exact solutions.

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Study on anisotropic heat transfer and thermal damage in nanosecond pulsed laser processing of CFRP

et al. 2023

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Nanosecond pulsed laser processing is an efficient method of processing carbon fiber reinforced plastic(CFRP), which is widely used in the manufacturing field of aviation, medical, and auto industries. The anisotropic heat transfer of carbon fiber is a key factor degrading the surface integrity of laser processing CFRP. So it is urgent to explore the significant mechanism of anisotropic heat transfer of laser interacting with CFRP. A novel numerical model considering anisotropic heat transfer was established to analyze heat transfer and thermal damage of CFRP laser machining. By comparison of simulation and experiments, the average error of ablation depth and width ranges from 4.71% to 15.09%, so the model could precisely simulate the CFRP laser machining. It demonstrates that the heat conductivity along the axial carbon fiber is higher than that along the radial, resulting in an elliptical ablation morphology. And when the laser scanning direction is parallel to the direction of the carbon fiber, deeper and narrower microgrooves can be obtained. In addition, laser processing at the edge of the CFRP plate causes serious heat accumulation, leading to severe thermal damage. The simulation and experiments were conducted to explore the effect of parameters including laser energy, scanning speed, and scanning space on the depth and width of laser ablation. A deeper micro‐channel with a smooth machined surface and small thermal damage was obtained when laser energy E = 0.275 mJ, scanning speed v = 630 mm/s, and scanning space h = 21 μm.

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Numerical simulation of metal removal in laser drilling using meshless local Petrov–Galerkin collocation method

Cited by 13 publications

References 24 publications

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

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

Development of the Meshless Local Petrov-Galerkin Method to Analyze Three-Dimensional Transient Incompressible Laminar Fluid Flow

Study on anisotropic heat transfer and thermal damage in nanosecond pulsed laser processing of CFRP

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