Finite element simulation of coating-induced heat transfer: application to thermal spraying processes

Berthelsen, Rolf; Tomath, Dennis; Denzer, Ralf; Menzel, Andreas

doi:10.1007/s11012-015-0236-7

Cited by 9 publications

(4 citation statements)

References 25 publications

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“…ermal transfer printing, to put it simply, is the process of transferring ink from a ribbon medium to paper or film using heat and pressure and is mainly used for label printing. When the label passes through the print head and pressure shaft of the printer, the ink is transferred to the label by heat and pressure [1]. Its working principle is shown in Figure 2.…”

Section: The Patterned Arrangement Methods Ofmentioning

confidence: 99%

“…Among them, Berthelsen believed that optimizing the thermal spraying process based on the temperature or the residual stress state caused by temperature requires a numerical framework to simulate. A finite element framework was proposed for this work to simulate the mass deposition caused by thermal spray coating, combined with the nonlinear heat transfer simulation of rigid thermal conductors [1]. However, the description of the simulated experimental process is still relatively lacking, and the deficiencies of the entire experiment are not particularly clear.…”

Section: Introductionmentioning

confidence: 99%

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The Silver Ion and Nanocrystalline Pattern in the Glass Substrate, the Electric Field-Induced Thermal Transfer and Ink Absorption Layer Structure and Printing Performance

Dong

2022

Advances in Materials Science and Engineering

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People’s research on nanocrystals is getting more in-depth with the development of science and technology, and the patterned arrangement of nanocrystals can greatly improve the performance of our equipment in related fields, allowing people to control the patterning of nanocrystals. Research on thermal transfer is also increasing. Glass materials doped with patterned metal nanocrystals have great application potential, and the search for a simple and efficient patterned preparation method has attracted great attention of many researchers. Using the directional induced migration effect of the high temperature and high voltage DC electric field, combined with the subsequent heat treatment process, the distribution of silver nanocrystals corresponding to the surface silver film pattern can be formed in the silicate glass substrate, to realize the electric field-induced thermal transfer of the nanocrystal pattern print. This article aims to study the patterned thermal transfer of silver ions and nanocrystals on the glass substrate by applying an electric field to induce and analyze the ink absorption layer structure and printing performance. On this basis, an electron beam-induced thermal transfer method and Maxwell’s equation are proposed to investigate and calculate the structure of the ink absorption layer. The experimental structure shows that using this method increases the success rate of the preparation of silver ions and nanocrystal patterns on the glass substrate by 30%, which improves the ink absorption layer and printing performance to different degrees.

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Section: The Patterned Arrangement Methods Ofmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Silver Ion and Nanocrystalline Pattern in the Glass Substrate, the Electric Field-Induced Thermal Transfer and Ink Absorption Layer Structure and Printing Performance

Dong

2022

Advances in Materials Science and Engineering

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“…depending on the convection or conduction coefficient a con and on the temperature of the surrounding medium h M , see e.g. [3] for more details.…”

Section: Model Formulationmentioning

confidence: 99%

Identification of thermal material parameters for thermo-mechanically coupled material models

Rose

Menzel

2021

Meccanica

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The possibility of accurately identifying thermal material parameters on the basis of a simple tension test is presented, using a parameter identification framework for thermo-mechanically coupled material models on the basis of full field displacement and temperature field measurements. Main objective is to show the impact of the material model formulation on the results of such an identification with respect to accuracy and uniqueness of the result. To do so, and as a proof of concept, the data of two different experiments is used. One experiment including cooling of the specimen, due to ambient temperature, and one without specimen cooling. The main constitutive relations of two basic material models are summarised (associated and non-associated plasticity), whereas both models are extended so as to introduce an additional material parameter for the thermodynamically consistent scaling of dissipated energy. The chosen models are subjected to two parameter identifications each, using the data of either experiment and focusing on the determination of thermal material parameters. The influence of the predicted dissipated energy of the models on the identification process is investigated showing that a specific material model formulation must be chosen carefully. The material model with associated evolution equations used within this work does neither allow a unique identification result, nor is any of the solutions for the underlying material parameters close to literature values. In contrast to that, a stable, that is locally unique, re-identification of the literature values is possible for the boundary problem at hand if the model with non-associated evolution equation is used and if cooling is included in the experimental data.

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“…with σ boltz = 1.38064852 × 10 −23 m 2 kg s −2 K −1 corresponding to the Stefan-Boltzmann constant, emiss being the emissivity coefficient, θ Z defining the value of absolute zero on the specific temperature scale used and with θ amb referring to the ambient temperature of the surrounding media. For further insight into the heat transfer mechanism the interested reader is referred to, e.g., [6].…”

Section: Heat Effectsmentioning

confidence: 99%

A computational phase transformation model for selective laser melting processes

2020

Self Cite

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Selective laser melting (SLM) has gained large interest due to advanced manufacturing possibilities. However, the growing potential also necessitates reliable predictions of structures in particular regarding their long-term behaviour. The constitutive and structural response is thereby challenging to reproduce, due to the complex material behaviour. This motivates the aims of this contribution: To establish a material model that accounts for the behaviour of the different phases occurring during SLM but that still allows the use of (basic) process simulations. In particular, the present modelling framework explicitly takes into account the mass fractions of the different phases, their mass densities, and specific inelastic strain contributions. The thermomechanically fully coupled framework is implemented into the software Abaqus. The numerical examples emphasise the capabilities of the framework to predict, e.g., the residual stresses occurring in the final part. Furthermore, a postprocessing of averaged inelastic strains is presented yielding a micromechanics-based motivation for inherent strains.

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Finite element simulation of coating-induced heat transfer: application to thermal spraying processes

Cited by 9 publications

References 25 publications

The Silver Ion and Nanocrystalline Pattern in the Glass Substrate, the Electric Field-Induced Thermal Transfer and Ink Absorption Layer Structure and Printing Performance

The Silver Ion and Nanocrystalline Pattern in the Glass Substrate, the Electric Field-Induced Thermal Transfer and Ink Absorption Layer Structure and Printing Performance

Identification of thermal material parameters for thermo-mechanically coupled material models

A computational phase transformation model for selective laser melting processes

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