Macroscopic modelling of the selective beam melting process

Riedlbauer, Daniel; Mergheim, Julia; McBride, Andrew; Steinmann, Paul

doi:10.1002/pamm.201210179

Cited by 5 publications

(6 citation statements)

References 2 publications

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“…The result of solving the spectral problem can be a set of eigenvalues and eigenvectors of a discrete analogue of the original problem, while the smallest positive value is taken as critical. Similar problems with the study of temperature effects were considered in works (Knyazeva et al, 2007;Riedlbauer et al, 2012;Keller et al, 2013;Lurie et al, 2015;Formalev and Kolesnik, 2018;Rabinsky and Tushavina, 2019a;Rabinskiy and Tushavina, 2019b;Formalev and Kolesnik, 2019).…”

Section: Resultsmentioning

confidence: 76%

Validation of Methodology for Modeling Effects of Loss of Stability in Thin-Walled Parts Manufactured Using SLM Technology

Dobryanskiy¹,

Rabinskiy²,

Tushavina³

2019

PTQ

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Additive manufacturing technologies make it possible to manufacture any product in layers based on a 3D computer model, but this issue is understudied. Therefore, this paper considers the problem of describing the effects of buckling arising in the three-dimensional printing of products containing elements whose length significantly exceeds their thickness or the characteristic size of the cross section. The behavior of these elements, from the point of view of material mechanics, can be described using models of plates or beams. In this study, we compare the results of calculations obtained using the model of non-stationary thermal conductivity and thermos-elasticity with experimental data for a specific element of printed product in which stability loss occurs. It was concluded that, at the initial moments of time, the lowest critical impact coefficient is realized, which in turn makes it the most dangerous phenomenon. The possibility of changing print parameters and product geometry to exclude the mentioned effects has been investigated. The considered structural element may lose stability during the building process. The results of solving the spectral problem indicated that over time the value of the critical effect decreases and asymptotically tends to a fixed minimum value.

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Section: Resultsmentioning

confidence: 76%

Validation of Methodology for Modeling Effects of Loss of Stability in Thin-Walled Parts Manufactured Using SLM Technology

Dobryanskiy¹,

Rabinskiy²,

Tushavina³

2019

PTQ

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“…The appearance of internal stresses in an object to be produced is connected with the essential spatiotemporal heterogeneous distribution of temperature and conversion fields. The appearance of residual stresses is caused due to the fact that inelastic deformations [33] are not consistent, first of all, temperature shrinkage deformations at cooling, structural shrinkage due to the course of phase transformations (melt crystallization) that is notable for a deformation history of various material points because of heterogeneous temperatures, temperature gradients and temperature velocities.…”

Section: Development Of the Models Intended To Form Fields Of Residuamentioning

confidence: 99%

“…The process of manufacturing of components with the use of the additive manufacturing method is followed by complex thermo-mechanical phenomena resulting in the formation of technological residual stresses and possible contraction of components [26][27][28][29][30][31][32][33]. The appearance of internal stresses in an object to be produced is connected with the essential spatiotemporal heterogeneous distribution of temperature and conversion fields.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the Plasma 3D Deposition of Wire Materials

Трушников¹,

Smetannikov²,

Perminov³

et al. 2018

Additive Manufacturing of High-Performance Metals and Alloys - Modeling and Optimization

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The numerical modeling of the physical process of manufacturing parts using additive technologies is complex and needs to consider a variety of thermomechanical behavior. This is connected with the extensive use of the finite element computer simulation by means of specialized software packages that implement mathematical models of the processes. The algorithm of calculation of nonstationary temperature fields and stressstrain state of the structure during the process of 3D deposition of wire materials developed and implemented in ANSYS is considered in the paper. The verification of the developed numerical algorithm for solving three-dimensional problem of the production of metal products using arc 3D deposition of wire materials with the results of the experiment is carried out. The data obtained from calculations on the developed numerical model are in good agreement with the experiment.

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“…When creating products by using methods of AM, large temperature gradients and technological residual stresses arise in the volume of the material, resulting in disruption of the product shape, changes in the mechanical and operational characteristics of the object, and its destruction during manufacturing (King et al 2015;Li et al 2010;Ibiye et al 2011;Parry et al 2015;Wu et al 2014;Baufeld et al 2010;Riedlbauer et al 2012). In order to work out the regimes and optimize the technological process, it is advisable to carry out a preliminary modeling of the process of layer-by-layer formation of the product, which boils down to a multivariate solution of thermoconversion problems.…”

Section: Introductionmentioning

confidence: 99%

Numerical 3D simulation of wire deposition process to predict distortion of parts

Smetannikov

Maksimov

Трушников

et al. 2019

Mech Adv Mater Mod Process

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In the work, on the basis of the analysis of publications, existing approaches to the numerical modeling of additive processes of product formation are shown. The work itself is devoted to the study of the influence of parameters of the process of surfacing wire materials on the formation of residual deformations in parts. A mathematical formulation of the non-stationary thermomechanical problem is presented, and algorithms for solving the problem using the technology of birth and death of finite elements in the ANSYS package are described. Verification of the model created by the finite element was carried out on the basis of data from the experiment on surfacing a multilayer sample. The effect on the level of residual warping of the following process parameters was studied: the exposure time before the next layer was deposited; the motion path of the burner; ambient temperature. It is shown that the change in ambient temperature is the most effective way to reduce the residual distortions of the form.

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Macroscopic modelling of the selective beam melting process

Cited by 5 publications

References 2 publications

Validation of Methodology for Modeling Effects of Loss of Stability in Thin-Walled Parts Manufactured Using SLM Technology

Validation of Methodology for Modeling Effects of Loss of Stability in Thin-Walled Parts Manufactured Using SLM Technology

Modeling of the Plasma 3D Deposition of Wire Materials

Numerical 3D simulation of wire deposition process to predict distortion of parts

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