Thermomechanically coupled conduction mode laser welding simulations using smoothed particle hydrodynamics

Hu, Haoyue; Eberhard, Peter

doi:10.1007/s40571-016-0140-5

Cited by 31 publications

(15 citation statements)

References 34 publications

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“…Earlier on, Tong and Browne used weakly compressible SPH (WCSPH) to model the melt pool flow and heat transfer during laser spot welding [26], i.e., for millisecond pulses. Comparable laser spot welding simulations were performed for metallic workpieces in [27,28]. Regarding continuous irradiation, Yan et al studied hydrodynamic interactions during laser underwater machining of alumina by SPH [29].…”

Section: Introductionmentioning

confidence: 99%

“…Regarding continuous irradiation, Yan et al studied hydrodynamic interactions during laser underwater machining of alumina by SPH [29]. Later on, Hu et al simulated conduction mode [27,30] and deep penetration laser welding [30] of aluminium. Russell et al developed a comprehensive SPH methodology for laser based additive manufacturing and applied it to selective laser track melting [28].…”

Section: Introductionmentioning

confidence: 99%

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An Incompressible Smoothed Particle Hydrodynamics (ISPH) Model of Direct Laser Interference Patterning

Demuth

Lasagni

2020

Computation

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Functional surfaces characterised by periodic microstructures are sought in numerous technological applications. Direct laser interference patterning (DLIP) is a technique that allows the fabrication of microscopic periodic features on different materials, e.g., metals. The mechanisms effective during nanosecond pulsed DLIP of metal surfaces are not yet fully understood. In the present investigation, the heat transfer and fluid flow occurring in the metal substrate during the DLIP process are simulated using a smoothed particle hydrodynamics (SPH) methodology. The melt pool convection, driven by surface tension gradients constituting shear stresses according to the Marangoni boundary condition, is solved by an incompressible SPH (ISPH) method. The DLIP simulations reveal a distinct behaviour of the considered substrate materials stainless steel and high-purity aluminium. In particular, the aluminium substrate exhibits a considerably deeper melt pool and remarkable velocity magnitudes of the thermocapillary flow during the patterning process. On the other hand, convection is less pronounced in the processing of stainless steel, whereas the surface temperature is consistently higher. Marangoni convection is therefore a conceivable effective mechanism in the structuring of aluminium at moderate fluences. The different character of the melt pool flow during DLIP of stainless steel and aluminium is confirmed by experimental observations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Incompressible Smoothed Particle Hydrodynamics (ISPH) Model of Direct Laser Interference Patterning

Demuth

Lasagni

2020

Computation

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“…The modeling approach for laser welding using the SPH method is based on previous work of simulating the conduction mode laser welding process [1,2]. Therefore, only a short summary is given in the following.…”

Section: Modeling With Sphmentioning

confidence: 99%

“…To simulate the process of deep penetration welding, the novel contribution of this paper is that we extend a developed SPH model for conduction mode welding [1,2] to include evaporation and exertion of recoil pressure on the melt due to evaporated material. Concerning the laser-material interaction, knowledge about the spatial intensity distribution as energy input is essential.…”

Section: Introductionmentioning

confidence: 99%

Towards Multiphysics Simulation of Deep Penetration Laser Welding Using Smoothed Particle Hydrodynamics

Hu¹,

Eberhard²,

Fetzer³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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“…This method is highly productive, effective in organizing parallel computing, and is used in particular in computer simulators to simulate the flow of a fluid with a free surface in real time. There appear first works on the application of this method in modeling welding processes (Hu and Eberhard 2017;Trautmann et al 2018) or in modeling powder-bed additive processes (Russell et al 2018). At the same time, this method is practically not mentioned in the open media about the use of this method to model the wire-based additive manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling of the electron-beam wire deposition additive manufacturing by the smoothed particle hydrodynamics method

Трушников

Koleva

Davlyatshin

et al. 2019

Mech Adv Mater Mod Process

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Background: The actual problem for calculating a shape of free surface of the melt when analyzing the processes of wire-based electron-beam surfacing on the substrate, being introduced into additive manufacturing, is the development of adequate mathematical models of heat and mass transfer. The paper proposed a formulation of the problem of melt motion in the framework of the Lagrangian description. The mathematical statement includes the balance equations for mass, momentum and energy, and physical equations for describing heat and mass transfer. Methods: The smoothed particle hydrodynamics method was used for numerical simulation of the process of wirebased electron-beam surfacing on the substrate made from same materials (titanium or steel). A finite-difference analog of the equations is given and the algorithm for solving the problem is implemented. To integrate the discretized equations Verlet method was utilized. Algorithms are implemented in the open software package LAMMPS. Results: The numerical simulation results allow the estimation of non-stationary volume temperature distributions, melt flow velocities and pressures, and characteristics of process. Conclusion: The possibility of applying the developed mathematical model to describe additive production is shown. The comparison of numerical calculations with experimental studies showed good agreement.

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Thermomechanically coupled conduction mode laser welding simulations using smoothed particle hydrodynamics

Cited by 31 publications

References 34 publications

An Incompressible Smoothed Particle Hydrodynamics (ISPH) Model of Direct Laser Interference Patterning

An Incompressible Smoothed Particle Hydrodynamics (ISPH) Model of Direct Laser Interference Patterning

Towards Multiphysics Simulation of Deep Penetration Laser Welding Using Smoothed Particle Hydrodynamics

Mathematical modeling of the electron-beam wire deposition additive manufacturing by the smoothed particle hydrodynamics method

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